factorise the following
1) 9 - 18x +8x^2
Answers
Answered by
10
hi frnd
We can Split the Middle Term of this expression to factorise it
In this technique, if we have to factorise an expression like ax2+bx+c, we need to think of 2 numbers such that:
N1⋅N2=a⋅c=8⋅9=72
AND
N1+N2=b=18
After trying out a few numbers we get N1=12and N2=6
12⋅6=72, and 12+6=18
8x2+18x+9=8x2+12x+6x+9
=4x(2x+3)+3(2x+3)
2x+3 is a common factor to each of the terms
=(2x+3)(4x+3)
follow me on Instagram @ishaagopika
Similar questions