On the solution of binary linear equations, inequalities, factorization, the problem of complete square formula, to ten can I want the topic, not the explanation

On the solution of binary linear equations, inequalities, factorization, the problem of complete square formula, to ten can I want the topic, not the explanation

(5) For the questions about the definition of quadratic equation with one variable, we should fully consider the three characteristics of the definition, and do not ignore that the coefficient of quadratic term is not 0. 2

Who can solve the problem of multiplication of polynomials and polynomials in Grade 8
Multiplication of polynomials and polynomials in eighth grade mathematics
1.(3x²-5y)(x²+2x-3)
2.2A (a-178; - ab-b-178;) - 3AB (4a-2b) + 2B (7a-178; - 4B + b-178;) who will?

1、=3x²（x²+2x-3）-5y（x²+2x-3）=3x4+6x3-3x2-5x²y-10xy+15y2、2a3-2a2b-2ab2-12a2b+6ab2+14a2b-8b2+2b3
=2a3+4ab2-8b2+2b3

If the polynomial x (x + 1) (x + 2) (x + 3) + P is exactly decomposed into the product of two cubic integers, where the coefficients of the quadratic term are all 1 and the coefficients of the primary term are the same,
Finding the maximum of P

X (x + 1) (x + 2) (x + 3) + P = [x (x + 3)] [(x + 1) (x + 2)] + P = (X & sup2; + 3x) (X & sup2; + 3x + 2) + P = [(X & sup2; + 3x + 1) - 1] [(X & sup2; + 3x + 1) + 1] + P = (X & sup2; + 3x + 1) & sup2; - 1 + P must be decomposable (

If the coefficient of the product of polynomial x + A and polynomial BX + 1 is 1 with x ^ 2 term and 2 with X term, then a-b=

(x+a)(bx+1)
=bx^2+(ab+1)x+a
The coefficient with x ^ 2 term is 1, and the coefficient with X term is 2
So B = 1
ab+1=1,a*1+1=1,a=0
a-b=0-1=-1