West Bengal Board Solutions for Chapter: Algebraic Formula, Exercise 3: Let's do Ourselves

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$px-\frac{1}{2}$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$p+q-r$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$p-q+r$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and band hence find the square.

$\frac{2x}{3}-\frac{3y}{4}$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$3{\mathrm{m}}^3-4{\mathrm{n}}^3$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$2x+y-z$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$999$

To find the square of the algebraic expression given below. Using ${\left(a-b\right)}^2=a^2-2ab+b^2$, what has to be substituted for a and b and hence find the square.

$p+q-r-s$