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1 vote
Will give medal !! Please someone help me ? The choices are

a) 2
b) 4
c) 6
d) 8

Will give medal !! Please someone help me ? The choices are a) 2 b) 4 c) 6 d) 8-example-1
User Ameyume
by
6.6k points

2 Answers

5 votes
I think the answer is b
User CJCombrink
by
6.8k points
4 votes
reemember
a²+b²=c²
for a right traingle where a and b are legs and c is hyptoonuse
given

a=x-2
b=x
c=√20

(x-2)²+(x)²=(√20)²
x²-4x+4+x²=20
2x²-4x+4=20
divide both sides by 2
x²-2x+2=10
minus 10 both sides
x²-2x-8=0
factor
what 2 numbers multily to get -8 and add to get -2
-4 and 2
(x-4)(x+2)=0
set to zero
x-4=0
x=4

x+2=0
x=-2, false we can't get negative measures

x=4

B is answer
User Architjn
by
7.2k points