Question

a(5a-1) + (a+2)ao quadrado

(2x+3)ao quadrado - x (x-4)

Answer 1

a(5a-1) + (a+2)²
(5a - 1) + (a + 2).(a + 2)
5a - 1 + (a² + 2a + 2a + 4)
5a - 1 + (a² + 4a + 4)
5a - 1 + a² + 4a + 4
a² + 5a + 4a - 1 + 4
a² + 9a + 3


(2x+3)² - x (x-4)
(2x + 3).(2x + 3) - x² + 4x
4x² + 6x + 6x + 9 -x² + 4x
4x² - x² + 6x + 6x + 4x + 9
3x² + 16x + 9