Factories:
16x5 – 144x3
We have,
= 3x3(x2 – 9)
By using the formula a2 – b2 = (a + b)(a – b)
We get,
16x5 – 144x3 = 3x3(x2 – 9)
= 16x3{(x)2 – (3)2}
= 16x3(x + 3)(x – 3)