find the value of (9x-4z)² using identities?
Answers
Answered by
0
Answer:
The value of (9x-4z)² = 81x² - 72xz + 16z²
Step-by-step explanation:
Given : the value of (9x-4z)² using identities
Solution : The given expression is in the form (a-b)²
Identity (a-b)² = a² - 2ab + b²
in the given a = 9x and b = 4z
∴ (9x-4z)² = (9x)² - 2 x 9x x 4z + (4z)²
= 81x² - 72xz + 16z²
Similar questions