factorise x(15x + 8) +1
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Answer:
x(15x+8)+1
= 15x²+8x+1
=15x²+(5+3)x+1
=15x²+5x+3x+1
=5x(3x+1)+1(3x+1)
=(3x+1)(5x+1)
(3x+1)=0 | (5x+1)=0
=3x= -1 | =5x= -1
=x= -⅓ | =x= -⅕