Answer:
2√5 + 9√7
Step-by-step explanation:
The given expression is
2√20 - 3√7 - 2√5 + 4√63
√20 = √4√5 = 2√5
√63 = √9√7= 3 √7
Now replace the above value with the given expression
2*2√5 - 3√7 -2√5+4*3√7
= 4√5 - 3√7-2√5+12√7
= 4√5 -2√5 - 3√7 +12√7
Simplifying the like terms, we get
= 2√5 + 9√7
Thank you.
