If 2a + 3b = 7 and ab = 2, find 4a² + 9b²
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Answered by
6
Answer:
(2a+3b)=7
Squaring on both sides
(2a+3b)^2 =7^2
4a^2+9b^2+2(2a)(3b)= 49
4a^2+9b^2+12ab =49
4a^2+9b^2+12(2)=49
4a^2+9b^2=49-24
4a^2+9b^2=25
Step-by-step explanation:
Answered by
5
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