21) Solve x2 - 13x - 30 = 0 by factoring.
2 answers:
Answer:
x=15 or x=-2
Step-by-step explanation:
x^2-13x-30=0
First find the multiples of 30 that will also equal to 13.
6*5=30 ,15*2=30 and 10*3=30
- x^2-15x+2x-30=0
- x(x-15)+2(x-15)=0
- (x-15)(x-2)=0
- x-15=0 or x+2=0
- x=15 or x=-2
Answer:
x= 15, -2!!!!!!!!!!!!!!
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