Solution
$$9x^2+25-30x$$ = $$9x^2-30x+25$$
= $$9x^2-15x-15x+25$$
= $$3x\left(3x-5\right)-5\left(3x-5\right)$$
= $$\left(3x-5\right)\left(3x-5\right)$$
= $$\left(3x-5\right)^2$$
Create a FREE account and get:
- Free SSC Study Material - 18000 Questions
- 230+ SSC previous papers with solutions PDF
- 100+ SSC Online Tests for Free
