Question

Simplify the expression 5√2 + √18

Answer 1

`\large\boxed{5\sqrt2+√(18)=8\sqrt2}`

Explanation:

`5\sqrt2+√(18)=5\sqrt2+√(9\cdot2)\\\\\text{use}\ √(ab)=√(a)\cdot√(b)\\\\=5\sqrt2+\sqrt9\cdot\sqrt2=5\sqrt2+3\sqrt2=(5+3)\sqrt2=8\sqrt2`

Answer 2

8√2

Explanation:

Simplify √18 which is 3√2

5√2+3√2=8√2