Answer:
You have to use (a +b )² and (a-b)² formula
(a+b)² = a² + 2ab + b²
(a-b)² = a² - 2ab + b²
only reverse the process
Step-by-step explanation:
i) 81x² + 90xy + 25y²
= (9x)² + 2×9x × 5y + (5y)²
= (9x + 5y)²
ii) 9a² - 12a/5 + 4/25
= (3a)² - 2× 3a × 2/5 + (2/5)²
= (3a - 2/5)²
MARK MY ANSWER BRAINLIST
Copyright © 2024 EHUB.TIPS team's - All rights reserved.
Answers & Comments
Answer:
You have to use (a +b )² and (a-b)² formula
(a+b)² = a² + 2ab + b²
(a-b)² = a² - 2ab + b²
only reverse the process
Step-by-step explanation:
i) 81x² + 90xy + 25y²
= (9x)² + 2×9x × 5y + (5y)²
= (9x + 5y)²
ii) 9a² - 12a/5 + 4/25
= (3a)² - 2× 3a × 2/5 + (2/5)²
= (3a - 2/5)²
MARK MY ANSWER BRAINLIST