5 min lezen
Equations: what they are and how to solve them
What an equation is, what its solution means, and how to solve equations step by step — from one-step equations to fractions and two variables.
Elk algebraprobleem komt neer op een paar stappen: vereenvoudigen, aan beide kanten hetzelfde doen en controleren. Deze lessen leren je elke stap met uitgewerkte voorbeelden waarvan de antwoorden door de wiskunde-engine van Sumzo worden gecontroleerd.
18 artikelen
5 min lezen
What an equation is, what its solution means, and how to solve equations step by step — from one-step equations to fractions and two variables.
1 min lezen
Use inverse operations to get the unknown on its own, keep the equation balanced, and always check your answer.
2 min lezen
Factorising, completing the square, the quadratic formula and the discriminant — and how to tell which method to use.
1 min lezen
What slope measures, how to find it from two points, and how to write a line as y = mx + b.
4 min lezen
How to simplify radicals by taking out perfect-square factors, what simplest radical form means, and how to simplify radical expressions — with checked examples.
2 min lezen
What a rational equation is, how to solve rational equations by multiplying by the lowest common denominator, and why every answer must be checked.
3 min lezen
The steps for factoring polynomials — common factor first, then two, three or four terms — with worked examples, each checked by multiplying back out.
3 min lezen
Solving inequalities like equations — with one extra rule — and showing the answer on a number line, in interval notation and as a shaded region.
2 min lezen
A solution is a value that makes an equation true. How to check one, and examples with one solution, no solution, all real numbers and two solutions.
2 min lezen
A five-step method for solving word problems, the key words that turn into maths, and worked examples — ages, consecutive numbers, discounts and tickets.
2 min lezen
Three ways to graph an equation — a table of values, slope and intercept, and key points of a parabola — with worked examples and how to match a graph to its equation.
3 min lezen
Function notation, how to graph a function from its formula, how to find its domain and range, and how composite functions such as f(g(x)) work.
2 min lezen
What a polynomial is, how to simplify and expand polynomials, and how to solve polynomial equations by factoring — with checked examples.
2 min lezen
What rational expressions are, their excluded values, and how to simplify, multiply, divide, add and subtract them — then solve rational equations.
2 min lezen
A literal equation has several letters. Solving it means isolating one of them — the same moves as an ordinary equation, with letters instead of numbers.
1 min lezen
How to simplify the following kinds of expression: like terms, brackets, exponents and complex fractions (a fraction inside a fraction), each with checked examples.
1 min lezen
The questions that say “find x” — equations, angles on a line, triangle angles, Pythagoras and similar shapes — and the one idea behind all of them.
2 min lezen
How to find the solution to a system of equations three ways, then how to graph a system of inequalities: boundary lines, shading and the overlap.
Los op. Haakjes wegwerken: . Trek af: . Tel 8 op: , dus .
Controle: en . Beide kanten zijn gelijk, dus klopt.
Typ het in de algebrarekenmachine van Sumzo: die toont elke stap, en de wiskunde-engine controleert het antwoord. De lessen hier leren de methoden achter die stappen.
Vul je antwoord in de oorspronkelijke vergelijking in. Komen beide kanten gelijk uit, dan klopt het — zo niet, zoek de eerste regel waar je uitwerking de vergelijking veranderde.
Uitdrukkingen vereenvoudigen en vergelijkingen in één en twee stappen oplossen. Alles daarna — kwadratische vergelijkingen, functies, stelsels — bouwt daarop voort.