x²-12x-132.x²+2xy-8y²3.a²+4ab+3b²4.x²-8xy-20y²5.m²-4mn-5n²6.x四次方-3x-47.x²-2-2x-158.x²+10x-249.x²-14x=24

Question

x²-12x-13  2.x²+2xy-8y² 3.a²+4ab+3b² 4.x²-8xy-20y² 5.m²-4mn-5n² 6.x四次方-3x-4  7.x²-2-2x-15 
8.x²+10x-24 9.x²-14x=24

Answer 1

x²-12x-13 =(x+1)(x-13)
2.x²+2xy-8y²=(x-2y)(x+4y)
3.a²+4ab+3b² =(a+b)(a+3b)
4.x²-8xy-20y² =(x-10y)(x+2y)
5.m²-4mn-5n²=(m-5n)(m+n)
6.x四次方-3x²-4 =(x²-4)(x²+1)=(x+2)(x-2)(x²+1)
7.x²-2x-15 =(x-5)(x+3)
8.x²+10x-24 =(x-4)(x-6)
9.x²-14x-24=(x-12)(x-2)