Factoring
x^2 +6x+8
(x+2)(x+4)
or
x=-2; x=-4
2x+7<15
Answer:x<4
5-2(3x-4)+6x^2 -3(x-3)
Answer:6x^2 -9x+19
K+2 ¼ = -1 ½
Answer: -15/4 or -3 ¾
3x^2 -12x=0
Answer: x=0 and x=4
2x^2 -6x-56
Answer:2(x-7)(x+4)
-3<=2x+1<7
Answer:-2<=x<3
3x(2y-5)-4y(x-3)-2(xy+7)
Answer: -15x+12y-14
Y/-3 -7=5
Answer: y=-36
2x^2 +5x-3 =0
Answer: x=½ and x=3
49x^2 -64
Answer:(7x-8)(7x+8)
-2(3x-4)>=2x+16
Answer: x<=-1
4x-6- 3/2x -15/4 +2x
Answer: 9/2 x-39/4
4(x+3)-2z=5(z-1)+8
Answer:z=3
½x^2 -3x+1=0
Answer: x=3+√7 and x=3-√7
x^3 -4x^2 +3x-12
Answer:(x^2+3)(x-4)
⅔x - ½ < ⅚
Answer: x<2
18x^5 y^2/3x^2 y^4 x (2xy^3)^2/ 6x^4
Answer:4xy^4
3x-5/2 +4 =x+7/3
Answer: x=5/7
⅔x^2 -5/4 x -⅙ =0
Answer: x=2 and x=-⅛
2x^3 -3x^2 -10x +15
Answer: (2x-3)(x^2 -5)
4(x+1)>=2(2x+1)
Answer: 4>=2
½(4x^2 -8x)-⅔(9x-3x^2)+x^2/x
Answer: 4x^2 -9x
-2[3x- ⅔ (6x-9)] +4=3(x+2)-5 /4 +2x
Answer:c=-11
1.2x^2 +√5x -0.7=0
Answer: x= -5√5 + √209 /12 and -5√5 - √209 /12