human
Add surds in the form mva + nvb \(
2 \sqrt{5}+2 \sqrt{45} \equiv d \sqrt{5}
\)

What is the value of \( d \) ? \( 7 \)
gpt
When simplifying surds, does not multiply the number in front of the surd with the square root of the largest square number that has been removed from the surd