exam Maths Puzzle Numerical Ability

how do i solve
(x+2)(x+2) < 25 as an inequality

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exam Other Question

i can factor most of them down i just cant get this one.
54b+2a^3b Help please

3. What is the critical chi-square value at the 5% significance rate with 16 degrees of freedom?

4. What is the critical chi-square value at the 1% significance rate with 6 degrees of freedom?