Question

Value expression 4x³ -5x²+8, if x= 2

Answer 1

Answer:

20

Step-by-step explanation:

if x=2 then,

4x³ -5x²+8 =

$4 ({2})^{3} - 5 ({2})^{2} + 8 \\ = 4(8) - 5 (4) + 8 \\ =32 - 20 + 8 \\ = 20$