Question

ayuda con matematicas​

Answer 1

a)

$A(x) = (x + 4)(2x + 2) \\ A(x) = x \times 2x + x \times 2 + 4 \times 2x + 4 \times 2 \\ A(x) = {2x}^{2} + 2x + 8x + 8 \\ A(x) = {2x}^{2} + 10x + 8$

b)

$V(x) = (x + 4)(2x + 2)(2x - 1) \\ V(x) = ( {2x}^{2} + 10x + 8)(2x - 1) \\ V(x) = {2x}^{2} \times 2x + {2x}^{2} \times ( - 1) + 10x \times 2x + 10x \times ( - 1) + 8 \times 2x + 8 \times (1) \\ V(x) = {4x}^{3} - {2x}^{2} + {20x }^{2} - 10x + 16x - 8 \\ V(x) = {4x}^{3} + {18x}^{2} + 6x - 8$