exam Maths Puzzle Numerical Ability

how could you use a calculator with only +, -, x, and division keys to check these claims about values of expressions involving fractional exponents?

a- 225 1/2 =15

b- 7 1/2

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exam Other Question

hi, my son asked me some questions on algebra but i myself was confused. hope u can help me to help him with these.write these follwing expressions in the simplest form:

1. b+7+2b+10
2. (3d+5)+(d-2)
3. 3m-(-m) Roots other than square root is called?