Question

(c) If 2a + 7b = 11 and ab = 2, find the value of 4a2 + 49b2.​

Answer 1

I hope this helps you

take both of sides paranthesis square

(2a+7b)^2=(11)^2

4a^2+2.4a.7b+49b^2=121

4a^2+49b^2+56.2=121

4a^2+49b^2=9

Answer 2

65

Explanation:

Please see the attached picture for full solution.