120_ch12_rev

# 120_ch12_rev - and simplify. 13) 2 7x 14) 3 2 9x 2 2...

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Mat 120 - Chapter 12 Review Name___________________________________ Find the square root if it is a real number, or state that the expression is not a real number. 1) 225 49 2) - 121 3) - 169 Find the function value indicated for the function. If necessary, round to two decimal places. If the function value is not a real number and does not exist, state so. 4) Evaluate t(x) = - x + 12 for t( - 4) Find the domain of the square root function. Then choose the correctly labeled graph which plots that radical function. 5) f(x) = 3 - x Find the cube root. 6) 3 - 125 Simplify the expression. Include absolute value bars where necessary. 7) 3 - 8( x + 4 ) 3 Rewrite the expression with a rational exponent. 8) 2x 8 y 3 1

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Use properties of rational exponents to simplify the expression. Write with positive exponents. 9) (x - 8/9 y 1/2 ) 2/3 Simplify by factoring. Assume that any variable in a radicand represents a positive real number. 10) 3 16x 17 y 15 Multiply and simplify. Assume that all variables in a radicand represent positive real numbers. 11) 10xy · 2xy 2 Multiply and simplify. Assume that all variables represent positive real numbers. 12) (5 2 - 4) 2 Rationalize the denominator

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Unformatted text preview: and simplify. 13) 2 7x 14) 3 2 9x 2 2 Rationalize the denominator. 15) 2 5- 2 Solve the equation. 16) 4x- 3 = 3 17) x 2- 24 = x + 6 Write in terms of i. 18)-160 Perform the indicated operation. Write the result in the form a + bi. 19) 8i + (-8- i) 20) (6 + 9i)- (-9 + i) 3 Find each product. Write the result in the form a + bi. 21) 4i(3- 3i) 22) (2- 9i)(8 + 4i) Divide and simplify to the form a + bi. 23) 1 + 3i 5 + 6i 4 Answer Key Testname: 120_CH12_REV 1) 15 7 2)-11 3) Not a real number 4) 4 5) x-10-5 5 10 y 10 5-5-10 6)-5 7)-2x- 8 8) 2xy 3/8 9) y 1/3 x 16/27 10) 2x 5 y 5 3 2x 2 11) 2xy 5y 12) 66- 40 2 13) 2 7x 7x 14) 3 6x 3x 15) 10 + 2 2 23 16) {3} 17) {-5, 6} 18) 4i 10 19)-8 + 7i 20) 15 + 8i 21) 12 + 12i 22) 52- 64i 23) 23 61 + 9 61 i 5...
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## This note was uploaded on 05/05/2008 for the course MAT 120/222/10 taught by Professor None during the Spring '08 term at ASU.

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120_ch12_rev - and simplify. 13) 2 7x 14) 3 2 9x 2 2...

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