Question

7.x² +5.x² +3.x² +2.x² +5 para x=4​

Answer 1

$7 \times {4}^{2} + 5 \times {4}^{2} + 3 \times {4}^{2} + 2 \times {4}^{2} = \\ 7 \times 16 + 5 \times 16 + 3 \times 16 + 2 \times 16 = \\ 7 \times 16 = 112 \\ 5 \times 16 = 80 \\ 3 \times 16 = 48 \\ 2 \times 16 = 32 \\ 112 + 80 + 48 + 32 = 192 + 80 \\ 192 + 80 = 272 < - - resposta$

Espero ter ajudado.