If 3 a-7 b-26 and a b-5- then the value of 9 a2-49 b2

The correct option is C 886 ...

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Polynomials

If 3 a-7 b=26...

Question

If 3a - 7b = 26 and ab = 5, then the value of 9a² + 49b².

872

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643

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516

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886

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(3 a - 7 b - c)^{2}

= 9 a^{2} + 49 b^{2} + c^{2} - 42 a b + 14 b c - 6 c a

3 a - 4 b = 7

a b = 10

9 a^{2} + 16 b^{2}

(3 a - \frac{1}{2}) (3 a - \frac{1}{2})

5 a + \frac{1}{3 a} = 5

9 a^{2} + \frac{1}{25 a^{2}}

\frac{3 a + 7 b}{3 a - 7 b} = \frac{4}{3}

\frac{3 a^{2} - 7 b^{2}}{3 a^{2} + 7 b^{2}}

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