# Pre Calculus Homework Help

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## Pre Calculus Help

This is a list of subjects you may be interested on

• Algebra
• Systems of Equations.
• Word problems.
• Factorization.
• Polynomials

• Geometry
• Triangles.
• Areas and Volumes.
• Circles.
• Lines
• Planes

• Trigonometry
• Circles.
• Sine, Cosine, Tangent, Cotangent, Secant, Cosecant.
• Pythagoras Theorem.
• De Moivre's Formula.
• etc....

We know how it feels to deal with those hard problems. With our help, you'll get that extra edge you need! No need to sweat with poorly explained problems from the books. We can provide solutions that suit your own needs. See some examples:

Problem 1. Solve the following system of equations:

Solution. We have to find and in such a way that (1) and (2) are satisfied simultaneously. The method consists on eliminating one of the variables using both equation, multiplying them by the right constants. More precisely, if we multiply the first equation by 2 we obtain

and now we sum both equations (3) and (4) to get , which means that . Now that we have , we can find simply replacing any of the equations (1) or (2). We choose (1), so we get , which implies that , and then . Summarizing

is the solution.

Problem 2. Rationalize the denominator

Solution. We have the factor in the denominator, so we multiply both the numerator and denominator by the conjugate , to obtain:

This way, we have found an equivalent expression with no radicals at the denominator, i.e.

but this last expression is rationalized.

Check more examples here.

 You can submit your problems for a free quote : By e-mail: You send us an e-mail with your questions. Could be any type of file, doc, pdf, xls, or a scanned image of the problems. It's free to get a quote, and there's no obligation after that. It costs you nothing to find out how much would it be to solve a list of problems.

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