in order to solve this problem you have to solve for x first wich you are given the data to pre forme so x=4 and x.2=8 and 8=y and y-4=4=a=x so a+8=12 and 12=b
-2
-7.5?
The quadratic expression x2+6x+8 when factorised equals (x+2)(x+4)
x2 + 2
y = 0x = y + 2plug 0 in for yx = 0 + 2x = 2
x = 2
-7.5?
-2
The quadratic expression x2+6x+8 when factorised equals (x+2)(x+4)
X2 or 2 times x?
If you have an equation of x2 plus x2, it is the same as saying 2 times x plus 2 times x. This can be written as 2x + 2x or x2 + x2. It is the same, then, as 4x. For example, if x equals 5: 2(5) + 2(5) = 10 + 10 = 20. 20 also equals 4(5).
x2 + 2
-x2+14x=49
y = 0x = y + 2plug 0 in for yx = 0 + 2x = 2
x2 + 2y = 52 + 2*2 = 25 + 4 = 29
(2-r)e-rr
x2 + 3x + 7 = 5 ∴ x2 + 3x + 2 = 0 ∴ (x + 1)(x + 2) = 0 ∴ x ∈ {-2, -1}