Step-by-step explanation:
3. -5
x=3. x=-5
x-3=0. x+5
(x-3)(x+5)=0
x²+5x-3x-15=0
x²+2-15=0
4. 2
x=4. x=2
x-4=0. x-2=0
(x-4)(x-2)=0
x²-2x-4x+8=0
x²-6x+8=0
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Answers & Comments
Step-by-step explanation:
3. -5
x=3. x=-5
x-3=0. x+5
(x-3)(x+5)=0
x²+5x-3x-15=0
x²+2-15=0
4. 2
x=4. x=2
x-4=0. x-2=0
(x-4)(x-2)=0
x²-2x-4x+8=0
x²-6x+8=0