Question

5. Se A= -( - 2 )², B= 6- 3³ + ( -7 )¹ e C= 4³- ( -6 )², CALCULE: A+B- C ​

Answer 1

$-\left(-2\right)^2\\\\\left(-2\right)^2=2^2\\\\=-2^2\\\\2^2=4\\=-4$          $6\left(-3\right)^3+\left(-7\right)^2\\\\=6\left(-27\right)+\left(-7\right)^2\\\\=6\left(-27\right)+49\\\\=-162+49\\=-113$  $4^3-\left(-6\right)^2\\\\=64-\left(-6\right)^2\\\\=64-36\\\\=28$

Agora vamos a conta > -4 + ( - 113) - (+28)

$-4+\left(-113\right)-\left(28\right)\\\\+\left(-113\right)=-113\\\\=-4-113-\left(28\right)\\\\-4-113=-117\\\\=-117-\left(28\right)\\\\-117-\left(28\right)=-145\\\\=-145$