+130511 I'm assuming that you might be trying to find the missing side of a right triangle with a leg of 4cm and a hypoteneuse of 64cm.....so, squaring both sides, we have......
4096 = x^2 + 16 subract 16 from both sides
4080 = x^2 take the positive root of both sides
√4080 = x = √(16*255) = 4√255 cm..... or about 63.87 cm
+118723 Do you mean
$$\\64 cm^2 = \sqrt{x^2+16} cm^2\\
or\\
64 cm^2 = \sqrt{x^2}+16 cm^2\\
or\\
something\;\;else?$$
+130511 I'm assuming that you might be trying to find the missing side of a right triangle with a leg of 4cm and a hypoteneuse of 64cm.....so, squaring both sides, we have......
4096 = x^2 + 16 subract 16 from both sides
4080 = x^2 take the positive root of both sides
√4080 = x = √(16*255) = 4√255 cm..... or about 63.87 cm
