Question

factorise 2 x square + 11x - 21​

Answer 1

Answer:

hope this helps u

Step-by-step explanation:

2x²+11x-21

= 2x²+14x-3x-21

= 2x(x+7)-3(x+7)

= (2x-3)(x+7)

Answer 2

$\color{red}\large\underline{\underline{Question:}}$

$2x^{2} + 11x - 21$

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$\color{purple}\large\underline{\underline{To\:Find:}}$

The factorization of the Equation.

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$\color{blue}\large\underline{\underline{Concept:}}$

By using the middle-spitting theorem.

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$\color{navy}\large\underline{\underline{Solution:}}$

$2x^{2} + 11x - 21$

$\Rightarrow 2x^{2} + (14 - 3)x - 21$

$\Rightarrow 2x^{2} + 14x - 3x - 21$

$\Rightarrow 2x(x + 7) - 3(x + 7)$

$\Rightarrow (x + 7)(2x - 3)$

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