Question

evaluate the expression if x= -2,a=x1,b=-3 (i)4x^3-8a^2+3b+17ab

Answer 1

Step-by-step explanation:

${:}\longrightarrow$

$4x {}^{3} - 8a {}^{2} + 3b + 17ab \\ = 4( - 2) {}^{3} - 8( - 2) {}^{2} + 3(3) + 17( - 2 \times 3) \\ = (4 \times - 8) - (8 \times 4) + 9 + (17 \times 6) \\ = - 32 - 32 + 9 + 102 \\ = - 64 + 111 \\ = 47$

${:}\longrightarrow$${\underline{\boxed{\bf{47}}}}$