Question

Find the product: a. 4 x (2a+1) b. 3xyx (x –y ) c. (a + b) ( a –b)

Answer 1

Step-by-step explanation:

a) 4 x (2a+1) = 4 x 2a + 4 x 1

= 8a + 4

b) 3xyz (x-y) = 3xyz (x) - 3xyz (y)

= 3x²yz - 3xy²z

c) (a+b) (a-b) = (a x a) + [a x (-b)] + (a x b) + [b x (-b)]

= a² - ab + ab - b²

= a² - b²

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