Question

Calcule :a)(-3)^2+6^2 b)3^2+(-5)^2 c)(-2)^3-(-1)^3 d)5^2-3^4-(-1)^9

Answer 1

$a) \: ( - 3) {}^{2} + 6 {}^{2} \\ ( - 3) \times ( - 3) + 6 \times 6 \\ 9 + 36 = 45$
$b) \: 3 {}^{2} + ( - 5) {}^{2} \\ 3 \times 3 + ( - 5) \times ( - 5) \\ 9 + 25 = 34$
$c) \: ( - 2) {}^{3} - ( - 1) {}^{3} \\ ( - 2) \times ( - 2) \times ( - 2) - ( - 1) \times ( - 1) \times ( - 1) \\ - 8 - ( - 1) = - 8 + 1 = - 7$
$d) \: 5 {}^{2} - 3 {}^{4} - ( - 1) { }^{9} \\ 25 - 81 - ( - 1) \\ 25 - 81 + 1 \\ - 56 + 1 = - 55$