SOLUTION: Factor each polynomial completely. Show work # 73 – 80 73. 9x^2 + 30x + 25 74. 4x^2 + 6x + 9 75. 3x^2y + 11xy + 8y 76. 5xy^2 – 9xy + 4x 77. 2x^2 + 2x – 12 78. 3x^2 +6x -

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Factor each polynomial completely. Show work # 73 – 80 73. 9x^2 + 30x + 25 74. 4x^2 + 6x + 9 75. 3x^2y + 11xy + 8y 76. 5xy^2 – 9xy + 4x 77. 2x^2 + 2x – 12 78. 3x^2 +6x -      Log On


   

Question 935858: Factor each polynomial completely. Show work # 73 – 80
73. 9x^2 + 30x + 25
74. 4x^2 + 6x + 9
75. 3x^2y + 11xy + 8y
76. 5xy^2 – 9xy + 4x
77. 2x^2 + 2x – 12
78. 3x^2 +6x -45

Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

73.
9x%5E2+%2B+30x+%2B+25
%283x%29%5E2+%2B+30x+%2B+5%5E2
%283x+%2B+5%29%5E2
%283x+%2B+5%29%283x+%2B+5%29

74.
4x%5E2+%2B+6x+%2B+9
%28%282x%29%5E2+%2B+6x%2B_b_%29-_+%2B+9....find 2%2A2%2Ab=6=>b=6%2F4=3%2F2
%28%282x%29%5E2+%2B+6x%2B%283%2F2%29%5E2%29-%283%2F2%29%5E2+%2B+9
%282x+%2B+3%2F2%29%5E2-9%2F4%2B9
%282x+%2B+3%2F2%29%5E2-9%2F4%2B36%2F4
%282x+%2B+3%2F2%29%5E2%2B27%2F4

75.
3x%5E2y+%2B+11xy+%2B+8y+
y%283x%5E2+%2B+11x+%2B+8%29+
y%283x%5E2+%2B3x%2B8x+%2B+8%29+
y%28%283x%5E2+%2B3x%29%2B%288x+%2B+8%29%29+
y%283x%28x+%2B1%29%2B8%28x+%2B+1%29%29+
y%28x%2B1%29%283x%2B8%29

76.
5xy%5E2-9xy+%2B+4x
x%285y%5E2-9y+%2B+4%29
x%285y%5E2-5y-4y+%2B+4%29
x%28%285y%5E2-5y%29-%284y+-+4%29%29
x%285y%28y-1%29-4%28y+-+1%29%29
x%285y-4%29%28y+-+1%29

77.
2x%5E2+%2B+2x-12
2%28x%5E2+%2Bx-6%29
2%28x%5E2-2x+%2B3x-6%29
2%28%28x%5E2-2x%29+%2B%283x-6%29%29
2%28x%28x-2%29+%2B3%28x-2%29%29
2%28x%2B3%29%28x-2%29

78.
3x%5E2+%2B6x+-45+
3%28x%5E2+%2B2x+-15+%29
3%28x%5E2+%2B5x-3x+-15+%29
3%28%28x%5E2+%2B5x%29-%283x%2B15%29+%29
3%28x%28x+%2B5%29-3%28x%2B5%29+%29
3%28x-3%29%28x%2B5%29+