Question

3y(2y-7)-3(y-4) - 63

Answer 1

Answer:

it is your answer

Step-by-step explanation:

3y-21-3-12-63

6y-3y-21-12-63

3y-96

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Answer 2

correct answer

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$\huge{\underline{\underline{{grey{\sf Required \: Answer }}}}}$

Step-by-step explanation:

☞$\sf{3y(2y-7)-3(y-4)-63=0}$

☞$\sf{6y^2-21y-3y+12-63=0}$

☞$\sf{6y^2-24y-51=0}$

☞$\bf{ By formula method }$

☞$\sf{x=\dfrac{-b±\sqrt{b^2-4ac}}{2a}}$

☞$\sf{x=\dfrac{24±\sqrt{576-4(6)(-51)}}{12}}$

☞$\sf{x=\dfrac{24±\sqrt{576+1224}}{12}}$

☞$\sf{x=\dfrac{25±\sqrt{1800}}{12}}$

☞$\sf{x=\dfrac{25± 2\sqrt{450}{12}}$

☞$\sf{x=\dfrac{25± 2\sqrt{450}{12}}$

☞ $\sf{x=\dfrac{25+2\sqrt{450}{12}}& x=\dfrac{25-2\sqrt{450}{12}}$

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