120_ch10_test_practice

120_ch10_test_practice - mat120_chapter10_test practice

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Unformatted text preview: mat120_chapter10_test practice Name___________________________________ Give the requested components for the polynomial. 1) 2x3y + x2y 7 + 15y 2; leading term and leading coefficient of the polynomial Leading Term:______________ Leading Coefficient:_______________ Given the function, find the indicated value. 2) Find f(-3) when f(x) = x 3 - 3x2 - 8x. Degree of Polynomial:___________________ Add the polynomials. 3) (8x2 - xy - y 2) + (x2 + 4xy + 5y 2) Subtract the polynomials. 4) (2x7 - 4x5 - 2x) - (7x7 - 9x5 - 18x) Multiply the polynomial 5) (2x3y)(-10x7y 6) 6) (x - 12)(x2 + 4x - 5) 7) (3x - 7y)(4x + 5y) 8) (x - 8)2 1 Factor the following polynomials comletely using any method. 9) ax + bx - ay - by 10) 6x2 - 13xy + 6y 2 11) x5 - 2x4 - 3x3 12) 25x2 - 49y 2 13) 4x3 + 32 14) x3 - 25x + 2x2 - 50 Use factoring to solve the following equations fir x 15) 10x2 + 19x + 6 = 0 2 16) 5x3 + 2x2 - 20x - 8=0 17) 11x2 = 8x Solve the problem. 18) If an object is projected upward with an initial velocity of 96 ft per sec from a height h of 112 ft, then its height t sec after it is projected is defined by the equation h = -16t2 + 96t + 112. How many sec after it is projected will it hit the ground? 19) The length of a rectangular storage room is 9 feet longer than its width. If the area of the room is 90 square feet, find its dimensions. 3 Answer Key Testname: 120_CH10_TEST_PRACTICE 1) leading term: x2y 7; leading coefficient: 1 degree: 9 2) -30 3) 9x2 + 3xy + 4y 2 4) -5x7 + 5x5 + 16x 5) -20x10y 7 6) x3 - 8x2 - 53x + 60 7) 12x2 - 13xy - 35y 2 8) 9) 10) 11) 12) 13) 14) x2 - 16x + 64 (a + b)(x - y) (3x - 2y)(2x - 3y) x3(x - 3)(x + 1) (5x + 7y)(5x - 7y) 4(x + 2)(x2 - 2x + 4) (x + 5)(x - 5)(x + 2) 15) {- 2 , - 3 } 5 2 16) {-2, - 2 , 2} 5 17) { 8 , 0} 11 18) 7 sec 19) 6 feet by 15 feet 4 ...
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120_ch10_test_practice - mat120_chapter10_test practice

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