if a +2b = 5 and ab = 2 , find the value of a² + 4b²
Answers
Answered by
4
Answer:
Value is 17 .
Step-by-step explanation:
a+2b = 5
ab = 2
a² + 4b²
= (a)² + (2b)²
= (a+2b)² - 2×a×2b
= (5)² - 4×2
= 25 -8
= 17 .
Answered by
3
Answer:
=>a²+4b²= 17
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