Question

factorise and find the answer for 2x^2+x-21​

Answer 1

Answer:

i

Step-by-step explanation:

I don't know about the question

Answer 2

solution=>

$= > 2x {}^{2} + x - 21 = 0 \\ \\ = > 2x {}^{2} - 6x + 7x - 21 = 0 \\ \\ = > 2x(x - 3) + 7(x - 3) = 0\\ \\ = > ( 2x + 7)(x - 3) = 0 \\ \\ = > 2x + 7 = 0 \\ \\ = > x = \frac{ - 7}{2} \\ \\ and = > x - 3 = 0 \\ \\ x = 3$

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