Question

Q11 and Q12. I need to know plzzz send the answer fast....​

Answer 1

Ans 11) For a cyclic quadrilateral the sum of opposite angles is 180

So 180 - (4x + 13) = 180 - 133 (Linear pair for angle QRS)

So 4x + 13 = 133

Which gives x = 30


Ans 12) If you simplify the equation given by cross multiplying you get

${a}^{2} + {b}^{2} = - ab$

Which gives us

${a}^{2} + {b}^{2} + ab = 0$

Now opening the expression

${a}^{3} - {b}^{3} = (a - b)( {a}^{2} + ab + {b}^{2} )$

Now using the above condition we get

${a}^{3} - {b}^{3} = 0$

Hope this helps you!

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