Question

27.
9x -7 3x – 4
3x + 5
x + 6​

Answer 1

Answer:

81x^4+450x^3-585x^2+2354x-840

Explanation:

$(9x-7)(3x-4)(3x+5)(x+6)\\(9x(3x-4)-7(3x-4))(3x(x+6)+5(x+6))\\(27x^2-36x-21x-28)(3x^2+18x+5x+30)\\(27x^2-57x-28)(3x^2+23x+30)\\27x^2(3x^2+23x+30)-57x(3x^2+23x+30)-28(3x^2+23x+30)\\81x^4+621x^3+810x^2-171x^3-1311x^2+1710x-84x^2+644x-840\\81x^4+621x^3-171x^3+810x^2-1311x^2-84x^2+1710x+644x-840\\\\81x^4+450x^3-585x^2+2354x-840$

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