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Hi!! I need 10 examples of factoring quadratic equation

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MainStreamGeniusviz
example x(squared)+6x+9 factors is (x+3)(x+3) x+3=0 X(sub1)=-3 x+3 X(sub2)=-3    
JENKEEviz
1. x²+4x+4=0
(x+2)(x+2) or (x+2)²
2. x²+4x-21=0
(x+7)(x-3)
3. 9x²-16=0
(3x+4)(3x-4)
4. 2x²-10x=0
2x(x-5)
5. 2x²-6x-8=0
(2x+2)(x-4)