Select all of the following that are quadratic functions.
x= 3x2 - 6y +5
y+3 =-2x2+5
y= 2x2 - 8 x + 6
y=-7x-4
y-3x = 4 x 3 – x2 + 9
y = 5 x(x + 9) - 8
y-2x2 = 3x - 2x2 + 4

infinitely many solutions

step-by-step explanation:

we have been given the equation;

2(2x + 3) = -4 + 2(2x + 5)

we need to determine the value of x.

2(2x + 3), we expand this expression to obtain 4x + 6

similarly 2(2x + 5) will become 4x + 10

now we have;

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 10 - 4

4x + 6 = 4x + 6

the expression on the left hand side is identical to the one on the right hand side. therefore, we are looking at just a single straight line whose equation is;

y = 4x + 6

consequently, we shall have infinitely many solutions

46.2+112.3

step-by-step explanation: