Question

The value of 5x2-2x-5 at x=-2 is

Answer 1

Answer:

$5 {x}^{2} - 2x - 5 = 5 { (- 2)}^{2} - 2 \times ( - 2) - 5$

$20 + 4 - 5 = 24 - 5 = 19$

Answer 2

Answer:

heya mate ☺

▶ Given, x = -2

and, 5x^2 - 2x - 5

▶ Solution,

$putting \: back \: the \: value \: of \: x \\ 5x ^{2} - 2x - 5 \\ = 5( - 2) - 2( - 2) - 5 \\ = - 10 - ( - 4) - 5 \\ = - 10 + 4 - 5 \\ = - 10 - 5 + 4 \\ = - 15 + 4 \\ = - 11$

✌ hope it helps u ✌