Question

can any I solve this please ​

Answer 1

Answers:

1) 3

2) 2x¹¹ + 3xy

6) a) (2a - 3b)²

= (2a)² - 2(2a)(3b) + (3b)²

= 4a² - 12ab + 9b²

6) b) (2x + 5) (2x - 3)

= (2x)² + (5-3)(2x) + (5)(-3)

= 4x² + 4x - 15

6) c) (x/2 - y/3)³

= (x/2)³ - 3(x/2)²(y/3) + 3(x/2)(y/3)² - (y/3)³

= x³/8 - 3(x²/4)(y/3) + 3(x/2)(y²/9) - y³/27

= x³/8 - x²y/4 + xy²/6 - y³/27

7) a) 2a² - 7a - 15

= 2a² - 10a + 3a - 15

= 2a (a - 5) + 3 (a - 5)

= (2a + 3) (a - 5)

8) a) (103)³

= (100+3)³

= (100)³+(3)³+3(100)²(3)+3(100)(3)²

= 1000000+27+90000+2700

= 1092727