Question

2. 5x2+4x-10= , com x = 2

Answer 1

Oie, Td Bom?!

$= 5x {}^{2} + 4x - 10$

$= 5 \: . \: 2 {}^{2} + 4 \: . \: 2 - 10$

$= 5 \: . \: 4 + 8 - 10$

$= 20 + 8 - 10$

$= 28 - 10$

$= 18$

Att. Makaveli1996