Question

2x²-10x + 7 para X = 2 x= -2​

Answer 1

$x = 2 \\ 2 \: . \: 2 {}^{2} - 10 \: . \: 2 + 7 \\ 2 \: . \: 4 - 10 \: . \: 2 + 7 \\ 8 - 20 + 7 \\ 15 - 20 \\ \boxed{\boxed{\boxed{ - 5}}}$

$x = - 2 \\ 2 \: . \: ( - 2) {}^{2} - 10 \: . \: ( - 2) + 7 \\ 2 \: . \: 4 - 10 \: . \: ( - 2) + 7 \\ 8 + 20 + 7 \\ 28 + 7 \\ \boxed{\boxed{\boxed{35}}}$

att. yrz

Answer 2

Resposta:

$78$

12-23 retorna a 3 e votal a 34 e vem sai 1 volta 12