Question

(1) x²+x- 20=0
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Answer 1

Answer:

x2 +x-20=0

x2+5x-4x-20

x (x+5)-4 (x+5)

(x+5)(x-4)

x=-5 or x=4

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Answer 2

Step-by-step explanation:

x²+x-20=0

x²+5x-4x-20=0

x(x+5)-4(x+5)=0

(x+5)(x-4)=0

x+5= 0

x=-5

x-4=0

x=4