Question

determine o valor da expressao

a)6x - 12y +3. (6y +3),para x =2 e y = 1/2

Answer 1

Só substituir

$6 \times 2 - 12 \times \frac{1}{2} + 3(6 \times \frac{1}{2} + 3)$

$12 - 6 + 3(3 + 3)$

$12 - 6 + 3 \times 6$

$12 - 6 + 18$

$30 - 6$

$24$