If the value of the polynomial 2x & # 178; - ax + Y & # 178; - 2 (BX & # 178; + 3x-y & # 178; + 5) about X is independent of X, then the value of 5A + B-3 is obtained

If the value of the polynomial 2x & # 178; - ax + Y & # 178; - 2 (BX & # 178; + 3x-y & # 178; + 5) about X is independent of X, then the value of 5A + B-3 is obtained

If the value of the polynomial 2x (x) of the polynomial 2x (2x \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\+ 1-3 = - 32

Given that the polynomials ax & # 178; + 2bxy + X & # 178; - x-2xy + y about X and y do not contain quadratic terms, find the value of 5a-8b

Polynomial ax & # 178; + 2bxy + X & # 178; - x-2xy + y
=(a+1)^x^2+(2b-2)xy-x+y
Without quadratic term
a+1=0
2b-2=0
a=-1 b=1
5a-8b=-5-8=-13

It is known that the polynomials AX2 + 2bxy + x2-x-2xy + y about X and y do not contain quadratic terms, so we can find the value of 5a-8b

∵ the polynomials AX2 + 2bxy + x2-x-2xy + y of X and y do not contain quadratic terms, ∵ a + 1 = 0, 2b-2 = 0, so a = - 1, B = 1, then 5a-8b = - 5-8 = - 13