Question

factorise 16ab²-21a²b​

Answer 1

Answer:

16(a−b)

2

−4(c−d)

2

Using,

(a

2

−b

2

)=(a+b)(a−b)

=(4a−4b)

2

−(2c−2d)

2

=(4a−4b+2c−2d)(4a−4b−2c+2d)

Answer 2

Answer:

ab(−21a+16b)

Step-by-step explanation:

Factor 16ab2−21a2b

−21a2b+16ab2

=ab(−21a+16b)

hope it helps