When doing polynomial multiplication, Xiao Li found that: by using the law of distribution of multiplication to expand the multiplication of polynomials and polynomials, the phenomenon of missing terms may appear after merging the similar terms. Now there is a quadratic trinomial X & # 178; + 2x + 3, which is multiplied by a binomial ax + B, the product does not appear a quadratic term, and the coefficient of the quadratic term is 1, so we can find the value of a and B Why is there no primary term and why is the coefficient of the secondary term 1

When doing polynomial multiplication, Xiao Li found that: by using the law of distribution of multiplication to expand the multiplication of polynomials and polynomials, the phenomenon of missing terms may appear after merging the similar terms. Now there is a quadratic trinomial X & # 178; + 2x + 3, which is multiplied by a binomial ax + B, the product does not appear a quadratic term, and the coefficient of the quadratic term is 1, so we can find the value of a and B Why is there no primary term and why is the coefficient of the secondary term 1

(X & # 178; + 2x + 3) (AX + b) = the cube of AX + BX & # 178; + 2aX & # 178; + 2bx + 3ax + 3B = the cube of AX + (B + 2a) x & # 178; + (2B + 3a) x + 3B because there is no linear term and the coefficient of quadratic term is 1, so B + 2A = 1, 2b + 3A = 0, the equation system of solution is a = 2, B = - 3

Given 4x-5y + 2 = 0, the value of (9 ^ 2x) / 3 ^ 5x is

4x-5y+2=0
4x-5y=-2
(9^2x)/3^5y
=3^4x/3^5y
=3(4x-5y)
=3^(-2)
=1/9
Please check the questions for errors