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If x/a + y/b ; ax - by = a square - b square , then x/y = |
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Answer» ong>Step-by-step EXPLANATION: By cross MULTIPLICATION, do you mean cross multiplication of the coefficients of the variables? xa+yb=2 ax−by=a2−b2 Rewrite the first equation in a more BEAUTIFUL form. Multiply it throughout by ab . bx+ay=2ab The coefficients of the variables are interchanged between the two equations. I assume that by cross multiplication, you mean making the coefficients equal, so that a simple subtraction of the equations will eliminate a variable. Multiply the first equation by a and the second by B . abx+a2y=2a2b abx−b2y=a2b−b3 Subtract them. (a2+b2)y=(a2+b2)b ⟹y=b Substituting this value in any of the above equations will yield the value of X . bx+ay=2ab ⟹bx+ab=2ab ⟹x=a |
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