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PLEASE PLEASE PLEASE HELP!!

Can someone please help me with a step by step of this problem ? I'll seriously appreciate it, and thank you so so so much in advance!!
DON'T ANSWER IF YOU'RE UNSURE!!! I need actual help, please don't just take my points. :c

PLEASE PLEASE PLEASE HELP!! Can someone please help me with a step by step of this-example-1

2 Answers

1 vote
A^2 to get 45 and b ^2to get 20
User Gaurav Ojha
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5.8k points
1 vote
A^2=45 so get the sq rat of 45
B^2=20 get the sq rat of 20
User Raphael Deiana
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6.1k points