Question

Practice Set 2.2
equations by factorisaton
2) x² + x - 20 = 0
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Answer 1

Answer:

Step-by-step explanation:

Answer 2

Answer:

x=4,-5

Step-by-step explanation:

${x}^{2} + 5x - 4x + 20 = 0$

$x(x + 5) - 4(x + 5) = 0 \\ (x - 4)(x + 5) = 0 \\ x = 4 \: or \: - 5$