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( 4p + 3 ) ( 2p - 4 )=8p(p+1)
8p² - 16p + 6p - 12 = 8p² + 8p
- 10 p - 12 = 8p
- 10 p - 8 p = 12
- 18p = 12
p = - 12/18
= -2/3
2.
(p + 8)(p - 12) = (p + 4)²
p² - 12p + 8p - 96 = p² + 8p + 16
p² - 4p - 96 = p² + 8p + 16
p² - p² - 4p - 8p = 16 + 96
- 12 p = 112
p = - 112/12
= - 9,3
3.
1/4 (4y + 3) - 1 1/6 < 1/6 (2y - 11)
y + 3/4 - 7/6 < 1/3y - 11/6
y - 1/3y < -11/6 - 3/4 + 7/6
2/3 y < - 17/12
y < -17/12 × 3/2
y < - 17/8
8p² - 16 p + 6p - 12 = 8p² + 8p
8p² - 8p² - 16p +6p - 8p - 12= 0
-18p=12
p=-12/18
p= -2/3
2.(p+8) (p-12)= (p+4)²
p² - 12p + 8p - 96 = p² + 8p + 16
p² - 12p + 8p - 96 - p² - 8p - 16 = 0
-12p=112
p= -112/12
p= -28/3
3.1/4 (4y+3)-1 1/6 < 1/6 (2y-11)
y + 3/4 - 7/6 < 1/3y - 11/6
y- 1/3y < 7/6 - 3/4 - 11/6
2/3y < 14/12 - 9/12 - 22/12
2/3y < -17/12
y < -17/12 X 3/2
y < - 51/24
y < -17/8
atau y > 17/8