1)A) (x-6)² - 3x(2x-4)= x² - 12x + 36 - 6x² + 12x= -5x² + 36
B) (4+2y)²= 16 + 8y + 8y + 4y²= 4y² + 16y + 16
2)A) (9a² - 0.49)= (3a + 0.7)(3a - 0.7)
B) 5a - 5b + ca - cb= 5(a - b) + c(a - b)= (5 + c)(a - b)
1)
A) (x-6)² - 3x(2x-4)
= x² - 12x + 36 - 6x² + 12x
= -5x² + 36
B) (4+2y)²
= 16 + 8y + 8y + 4y²
= 4y² + 16y + 16
2)
A) (9a² - 0.49)
= (3a + 0.7)(3a - 0.7)
B) 5a - 5b + ca - cb
= 5(a - b) + c(a - b)
= (5 + c)(a - b)