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Expression Formation

Simplify 6y...

Question

Simplify
$(6 y + 7) (- 6 y + 7) = ?$

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Solution

$(6 y + 7) (- 6 y + 7) = (7 + 6 y) (7 - 6 y) = 7^{2} - (6 y)^{2} = 49 - 36 y^{2}$

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(3 x + 2 y - 9) (2 x - 6 y + 2) - [(4 x - 9 y - 1) + (- 3 x + 8 y + 7)]

Q. Simplify :
(3x + 2y - 9) (2x - 6y + 2) - [(4x - 9y - 1) + (-3x + 8y + 7)]

6 y^{2} + y - 7

[4 y^{3} + 5 y^{2} + 6 y] \div 2 y

Solve :

$\frac{6 y - 5}{2 y} = \frac{7}{9}$

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