exam Maths Puzzle Numerical Ability

True or False? The degree of a trinomial is never 4.

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exam Other Question

Can you verify my answer please?

Multiply
√7(2√3+3√7)
I got 2√21+21 is this correct?

Thanks for your help!
A rectangular field is 260 feet in perimeter.the length is 10 feet more than twice the width.what is the length?