factorise 5a -300+a^2
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Answered by
1
Answer:
(a+20)(a-15).using identity---::(x+a)(x+b)=x^2+(a+b)x+ab
Answered by
1
Step-by-step explanation:
a² + 5a - 300 = 0
a² + 20 a -15a -300 = 0
a( a+ 20) - 15 ( a+ 20) = 0
(a - 15) (a+ 20) = 0
a = 15 and a = -20
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