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sorry dear but how did 16-15 come up????

if u say u squared 4-root15 then there's gonna be a term with root cuz

it's square wld be 16 - 8root15 + 15!!!!!!

plz explain me the answer if i am getting it wrong

thank you very much

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I can answer questions in basic to advanced algebra (theory of equations, complex numbers), precalculus (functions, graphs, exponential, logarithmic, and trigonometric functions and identities), basic probability, and finite mathematics, including mathematical induction. I can also try (but not guarantee) to answer questions on Abstract Algebra -- groups, rings, etc. and Analysis -- sequences, limits, continuity. I won't understand specialized engineering or business jargon.

I taught at a two-year college for 25 years, including all subjects from algebra to third-semester calculus.**Education/Credentials**

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