Tamil Nadu Board Solutions for Chapter: Algebra, Exercise 6: Think

Multiply

$\left(a-5\right)$ and $\left(a+4\right)$

Multiply

$\left(a+b\right)$ and $\left(a-b\right)$

Multiply

$\left(m^4+n^4\right)$ and $\left(m-n\right)$

Multiply:

$\left(2x+3\right)\left(x+4\right)$ 

Multiply

$(x-5)(3x+7)$

Multiply

$(x-2)(6x-3)$

What is the highest power in the expression $3x^2\left(x^4-7x^3+2\right)$?

$-5y^2+2y-6$$=-\left(5y^2+2y-6\right)$

Is this correct? If not, correct the mistake.