Algebraic Expre...

Simplify: $$\left (\sqrt{5}-\sqrt{2})(\sqrt{5}+\sqrt{2}  \right)$$.

Evaluate using expansion of $$(a+b)^2$$ or $$(a-b)^2$$ :
$$(9.4)^2$$

Evaluate using expansion of $$(a+b)^2$$ or $$(a-b)^2$$ :
$$(188)^2$$

Evaluate:
$$203\times 197$$

Evaluate:
$$20.8 \times 19.2$$

Find the square of:

Find the square of:
$$391 $$

Find the square of: $$3a - 4b$$.

Find the square of: $$(3a + 7b)$$.