Question

factorize 7x square + 4x - 20​

Answer 1

Answer :

7x² + 4x - 20

⇒ 7x² + 14x - 10x - 20

⇒ 7x ( x + 2 ) - 10 ( x + 2 )

⇒ (x + 2)(7x - 10)

By zero product rule -

➾ x + 2 = 0

x = - 2

➾ 7x - 10

x = 10 / 7

Answer 2

Answer : (7x-10)(x+2)

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Solution :

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Given that the equation :

$7 {x}^{2} + 4x - 20$

On factorizing :

$7 {x}^{2} + 4x - 20 \\ \\ = > 7 {x}^{2} + 14x - 10x - 20 \\ \\ = > 7x(x + 2) - 10(x + 2) \\ \\ = > (7x - 10)(x + 2)$