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Factorise $7x^2+128x+36$.
Given:
The given expression is $7x^2+128x+36$.
To do:
We have to factorise the given expression.
Solution:
$7x^2+128x+36$
We can find the factorisation of the given expression by splitting the middle term.
Here, $126\times2=36\times7=252$ and $126+2=128$.
Therefore,
$7x^2+128x+36$
$=7x^2+126x+2x+36$
$=7x(x+18)+2(x+18)$
$=(7x+2)(x+18)$
Hence, factors of $7x^2+128x+36$ are $(7x+2)$ and $(x+18)$.Advertisements