What is the length of the hypotenuse of the triangle?
√20cm
√23cm
√40cm
√58 cm

Step-by-step explanation:

Using the pythagorean theorem (a^2+b^2=c^2) we know that 3^2+7^2=x^2

9+49=58, so the answer should be

Hope this helps!

step-by-step explanation:

first, eliminate the parenthesis:

3

x

+

2

−

4

x

second, group like terms:

3

x

−

4

x

+

2

third, combine like terms:

(

3

−

4

)

x

+

2

→

−

1

x

+

2

→

−

x

+

2