Question

find the zeros of the polynomials 2x²+x-21=0

Answer 1

$2 {x}^{2} + x - 21 = 0 \\ 2 {x}^{2} + 7x - 6x - 21 = 0 \\ x(2x + 7) - 3(2x - 7) = 0 \\ (2x + 7)(x - 3) = 0 \\ if \: x - 3 = 0 \\ x = 3 \\ if \: 2x + 7 = 0 \\ x = - \frac{7}{2}$
Heyy friend your answer is here

Answer 2

it's a easy bro bht chota