(1) (5 - 2x) (3 + x)
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Answer:
15+5x-6x-2x²=0
15-x-2x²=0
-2x²-x+15=0
-2x²-6x+5x+15=0
-2x(x-3)-5(x-3)=0
(-2x-5)(x-3)=0
-2x-5=0,x-3=0
-2x=5,x=3
x=5/-2,x=3
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