How to solve this question (-9-4√5)²=?
Answers
Answered by
2
use identity
(a+b)² = a² + b² + 2ab
(-9)² + (-4√5)² + 2 × (-9) × (-4√5)
81 + 80 + 72√5
161+72√5
Answered by
1
Answer:
Step-by-step explanation:
Mark this as the brainliest
( - 9²) + ( - 4 √5)² - 2(-9) (-4√5).
81 + ( 16×5) - 2 ( 36√5)
81 + 80 - 72√5
161 - 72√5
Similar questions