Answer:
7. 2 square root 234
8. 6 square root 2
Explanation:
7. 12^2 + 12^2 = x^2
144+144=x^2
288=x^2
square root 288
8.
x^2 + 9^2 = 18^2
x^2+81=324
x^2=243
square root 243
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