Section 10.5
Factor: 72b4+72b3-8b2
8b2(9b2+9b+1)
Factor: x2+9x+8
(x+1)(x+8)
Factor: 7b2-38b+15
(7b-3)(b-5)
Factor: 4a2-25
(2a-5)(2a+5)
We throw an object upward from the top of a 1200 ft tall building. The heigh of the object is :
h(t) = -16t2+160t+1200
How long does it take for the object to hit the ground?
15 seconds
Factor: -15x5-25x2-5x
-5x(3x4+5x+1)
Factor: x2-15x+54
(x-9)(x-6)
Factor: 3m2+26m-9
(3m-1)(m+9)
Factor: 4x2+20x+25
(2x+5)2
One side of a rectangle is 3 ft shorter than twice the other side. Find the sides if the area is 209 ft2.
11ft x 19ft
Factor:12x2z+9x2h+20yz+15yh
(3x2+5y)(4z+3h)
Factor: 4p2-52p+160
4(p-8)(p-5)
Factor: 10x2+23x-42
(2x+7)(5x-6)
Factor: 36m2+24mn+4n2
4(3m+n)2
14 feet, 9 feet
Factor: 15p3-20p2-9p+12
(5p2-3)(3p-4)
Factor: 6x2+24xy+24y2
6(x+2y)2
Factor: 27b2+54b-48
3(3b-2)(3b+8)
Factor: 45u2-80v2
5(3u+4v)(3u-4v)
Double Jeopardy:
Originally a rectangle was 8 cm x 17 cm. When both dimensions were decreased by the same amount, the area of the rectangle decreased by 66 cm2. Find the dimensions of the new rectangle
14 cm x 5 cm
Factor: 126v3+109v2+147v+126
3(6v2+7)(7v+6)
Factor: 4x2-36xy+72y2
4(x-3y)(x-6y)
Factor: 30x2+125xy-45y2
5(2x+9y)(3x-y)
Factor: 64x7-4y6x
4x(4x3+y3)(4x3-y3)
Find two consecutive positive odd integers whose product is 143
The integers are 11 & 13