exam Maths Puzzle Numerical Ability

Solve.

4x squared = 25

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exam Other Question

explain why there is no value of x for which the expressions x + 3 and x + 4 are equal?

My 7th grade son has this question on one of his worksheets and sadly I am unable to help him.

Thanks so much in advance for your help Please evaluate the complex expression writing the final solution in standard form (1 +bi); (2-i)*(3+2i)
Thank You