Question

एक्स स्क्वायर माइनस एक्स माइनस 20​

Answer 1

Step-by-step explanation:

$x {}^{2} - x - 20 \\ = x {}^{2} + 4x - 5x - 20 \\ = x(x + 4) - 5(x + 4) \\ = (x + 4)(x - 5) \\ = x + 4 = 0 \: \: \: \: \: .x - 5 = 0 \\ x = - 4 \: \: \: \: \: \: \: \: x = 5$

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Answer 2

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Answer:

x² −x−20

=x² +4x−5x−20

=x(x+4)−5(x+4)

=(x+4)(x−5)

=x+4=0.x−5=0

x=−4x=5