Question

初一数学题（因式分解）1）x的4次方-7x的2次方+92）x的4次方-14x的2次方+13）x的4次方-47x的2次方+

Answer 1

1）x^4-7x^2+9=(x^2+x-3)*(x^2-x-3)2）x^4-14*x^2+1=(x^2-4*x+1)*(x^2+4*x+1)3）x^4-47*x^2+1=(x^2-7*x+1)*(x^2+7*x+1)4）x^2-y^2+2*x+6*y-8(x-2+y)*(x+4-y) 5）m^4+4n^4=(m^2-2*m*n+2*n^2)*(m^2+2*m*n+2*n^2)6）x^2...