Question

Multiply (5z + 6)(2z + 1)(2z - 1)
Pls help and explain WELL ty

Answer 1

`\huge\boxed{\sf 20z\³ + 24z\² - 5z - 6}`

Explanation:

Given expression:

= (5z + 6)(2z + 1)(2x - 1)

Using formula (a + b)(a - b) = a² - b²

= (5z + 6)[(2z)² - (1)²]

= (5z + 6)(4z² - 1)

Distributing

= 5z (4z² - 1) + 6(4z² - 1)

= 20z³ - 5z + 24z² - 6

Arrange

= 20z³ + 24z² - 5z - 6

`\rule[225]{225}{2}`