section_1.2_key_sp_11

section_1.2_key_sp_11 - Section 1.2-Due Algebra Aerobics p...

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Section 1.2-Due January 31, 2011 •Algebra Aerobics, p. 18: 1, 2 •Exercises, p. 19-22: 9, 12, 14, 16, 18 •Algebra Aerobics, p. 18 : 1a. Describe: Here we take an x, square it and multiply by 3, then subtract that x from the result and add 1. b. On checking the ordered pairs, we discover that only (0,1) satisfies this equation. c. x -3 -2 -1 0 1 2 3 y 31 15 5 1 3 11 25 Here we need to be sure we take the square of x correctly (-2 squared is 4, not -4) and be sure to subtract x correctly when it is negative. •Algebra Aerobics, p. 18:2a. Describe. Here take an x, subtract 1 from it and square the entire result. Note, (x-1)^2 is NOT x^2-1^2. Also note that for this problem (and 1a) we are evaluating the expression for various x's. We are not looking to solve for when this expression is equal to zero. b. On checking ordered pairs, we discover that (0,1) and (1,0) satisfy this equation. c. x -3 -2 -1 0 1 2 3 y 16 9 4 1 0 1 4 •Exercises, p. 19-22: 9. Here the challenge is to read each graph correctly and, when
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section_1.2_key_sp_11 - Section 1.2-Due Algebra Aerobics p...

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