Factorise 15x^2 -2x-1
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Answered by
1
15X²-2x-1=0
a=15 b =-2c=-1
ac =-15
b°-2
using splitting middle term
15X²-2x-1
15x²-5x+3x-1
take common
=5x(3x-1)-(3x-1)
so= (5x-1) (3x-1)=0
5x-1=0
=>5x=1
=>x=1/5
for 3x-1
3x=1
x=1/3
hope it helps
@sonu
a=15 b =-2c=-1
ac =-15
b°-2
using splitting middle term
15X²-2x-1
15x²-5x+3x-1
take common
=5x(3x-1)-(3x-1)
so= (5x-1) (3x-1)=0
5x-1=0
=>5x=1
=>x=1/5
for 3x-1
3x=1
x=1/3
hope it helps
@sonu
Answered by
0
Answer:
15X²-2x-1=0
a=15 b =-2c=-1
ac =-15
b°-2
using middle term splitting
15X²-2x-1
15x²-5x+3x-1
take common
=5x(3x-1)-(3x-1)
so= (5x-1) (3x-1)=0
5x-1=0
=>5x=1
=>x=1/5
for 3x-1
3x=1
x=1/3
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