Question

i understand some of this but this ones got me stumped i tried pemdas but im still lost

Answer 1

Just replace $x$ with its given value:

$9x^{2}-4x-3~~~~\text{where }x=-2\\ \\ \\ 9\cdot (-2)^{2}-4\cdot (-2)-3\\ \\ =9\cdot 4+8-3\\ \\ =36+8-3\\ \\ =41$