Question

a) (5x - 1) . (5x + 1)
b) (a + b) · (a + b)
c) (2x2 – 3x – 6). (5x – 2)
d) (2a+3/5b).(a-1/2b)​

Answer 1

a) (5x - 1) . (5x + 1)

(5x)² - 1²

25x² - 1

b) (a + b) · (a + b)

(a+b)¹.(a+b)¹

(a+b)¹±¹

(a+b)²

c) (2.2-3x-6).(5x+2)

20x-8-15x² + 6x- 30x +12

-4x +4 -15x²

-15x² - 4x+4

D) (2a+3/5b).(a-1/2b)

3(4a+5b×(a-1/2b))

3(4a+5ab-2,5b²)