Question

Упростите выражение
(x+5)*6+(x-3)²

26-a²-(5-a)²

Answer 1

$6(x + 5) + {(x - 3)}^{2} = \ = 6x + 30 + {x}^{2} - 6x + 9 = \ = {x}^{2} + 39$
$26 - {a}^{2} - (5 - a)^{2} = \ = 26 - {a}^{2} - (5 - 10a + {a}^{2} ) = \ = 26 - {a}^{2} - 25 + 10a - {a}^{2} = \ = - 2 {a}^{2} + 10a + 1$