Question

Se A=
$x ^{2} + 1$
e B=
$- 2x {}^{2} + x + 2$
determine o valor de A-B?

Answer 1

A= x²+1  *(2)

B=-2x²+x+2

A=2x²+2

b=-2x²+x+2

x+4

x=-4

A=(-4)²+1

A=16+1

A=17

B=(8)²+(-4)+2

B=64-4+2

B=62