3(x-3)2(x+5) then x = ?
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Answer:
x=3 or -5
Step-by-step explanation:
= 3(x-3)×2(x+5)
= (3x-9)(2x+10)
= 6x^2+30x-18x-90
= 6x^2+12x+90 (divide by 6)
= x^2+2x-15
= x^2-3x+5x-15
= (x-3)(x+5) ( by factorization)
Therefore, x=3 or -5
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