Solve: 6(x - 4) + 3(x + 7) = 3
3/2
2/3
1/2
1/3
Correct answer is B
6(x - 4) + 3(x + 7) = 3
6x - 24 + 3x + 21 = 3
9x - 3 = 3
9x = 6
x = 23
Find the equation whose roots are -2/3 and -1/4
12x2 + 11x + 2 = 0
12x2 - 11x + 2 = 0
x2 - 11/12x + 2 = 0
12x2 - 11x - 2 = 0
x2 - 11/12x - 2 = 0
Correct answer is A
x = −23 and −14
⟹(x+23)=0;(x+14)=0
(x+23)(x+14)=0
x2+14x+23x+16=0
x2+1112x+16=0
12x2+11x+2=0
2n2 - 2n
2n-2(1-2n)
2n + 22n + 2
22n
Correct answer is A
1/4(2n - 2n+2) = 2-2(2n - 2n x 22) = 2n x -2(1 - 22)= 22n-2
(20 - 22) = 22n-2 - 2n
2y−5x4
9(2x−5x)x2y2
5x−2y2
c2y218y−45x
42y−5x
Correct answer is A
(3x−152y)÷6xy
= (6y−15x2xy)÷6xy
= 6y−15x2xy×xy6
= 3(2y−5x)2xy×xy6
= 2y−5x4
Solve the equation: 3a + 10 = a2
a = 5 or a = 2
a = -5 or a = 2
a = 10 or a = 0
a = 5 or a = 0
a = 5 or a = -2
Correct answer is E
3a + 10 = a2
a2 - 3a - 10 = 0
a2 - 5a + 2a - 10 = 0
a(a - 5) + 2(a - 5) = 0
(a - 5)(a + 2) = 0
a = 5 or a = -2.