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2*b^2 %2B 2*a^2 %2B 5*(a*b) - 9*x*(a %2B b) %2B x/((9*x^2))=0 |
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Answer» 9x^2 - 9(a + b)x + (2a^2 + 5ab + 2b^2) = 0 9x^2 - 9(a + b)x + (2a^2 + 4ab + ab + 2b^2) = 0 9x^2 - 9(a + b)x + [2a(a + 2b)+ b(a + 2b)] = 0 9x^2 - 9(a + b)x + (2a + b)(a + 2b) = 0 9x^2 - 3(2a + b)x - 3(a + 2b)x + (2a + b)(a + 2b) = 0 3x(3x - 2a - b) - (a + 2b)(3x - 2a - b) = 0 (3x - a - 2b)(3x - 2a - b) = 0 x = - (a + 2b)/3, - (2a + b)/3 |
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