Simplify
2x2-3(5-4x)
12x2-15
3(x2-2x)+x
3x2-5x
x2+7x-8
(x-1)(x+8)
Without using calculator, evaluate 1022
10404
Solve
x+3y= 8
2x+5y=13
x= - 1
y= 3
(y+ 3)2
y2+6y+9
2c2-50
2(c-5)(c+5)
Without using calculator, evaluate 492
2401
Solve
4x-5y=3
4x-9y=-1
x= 2
y=1
(3x - 4)2
9x2 -24x +16
5x2+7x-6
(5x-3)(x+2)
Without using calculator, evaluate 48 x 52
2496
Solve
8x - 3y - 12= 0
2x + 5y - 26 = 0
x=3
y= 4
4(5x-3)(2x-y)
40x2-20xy-24x+12y
6𝑎2 + 3𝑎𝑏 − 9𝑏2
3(2𝑎 + 3𝑏)(𝑎 − 𝑏)
Given that 𝑥 + 𝑦 = −1 and 𝑥𝑦 = −12, find the value of
𝑥2 + 𝑦2
25
7 (x-1) = 8y
x = -1.66
y= -2.33
9a2-(3a-2)(3a+2)
4
𝑎𝑏 + 2𝑎 + 3𝑏 + 6
(𝑎 + 3)(𝑏 + 2)
Given that 𝑥 + 𝑦 = −1 and 𝑥𝑦 = −12, find the value of (𝑥 + 1)(𝑦 + 1).
-12
An apple cost $x and a pear cost $2y.
4 apples and 5 pears cost $5.90 while 7 apples and 3 pears cost $6.30.
Find the cost of an apple and the cost of a pear.
apple = $0.60
pear = $0.70