factories the following 1)a²+b²-2ab-4c²
2)9x²-6xy+y²-z²
3)x²+1/x²-11
4)x²-1-2a-a²
5)x³+2x²-x-2
6)1+2ab-(a²+b²)
7)x⁴ +3x²+4
please some one help me
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Step-by-step explanation:
1. a²+b²-2ab-4c²
= (a-b)²-4c²
= (a-b)² - (2c)²
= (a-b-2c) ( a-b+2c)
2.9x²-6xy+y²-z²
= (3x-y)² - (z)²
= (3x-y-z)(3x-y+z)
3.x²+1
x²-11
= ye nhi aata
4.x²-1-2a-a²
=
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