Step-by-step explanation:
y = x² - 4x + 7
the general vertex form is
y = m(x-h)² + k
to bring the part "x² -4x" to an expression of (ax + b)² we need to add 4, as "x² - 4x + 4" = (x - 2)².
and since we add 4 there, we need to subtract 4 overall again to keep the value of the expression the same :
y = x² - 4x + 4 + 7 - 4 = (x - 2)² + 7 - 4 = (x - 2)² + 3
and so, that is the vertex form :
y = (x - 2)² + 3
3m-9=9+3m
add 9 to both sides
3m=18+3m
minus 3m both sides
0=18
false
no solution
the best discription would be an empty solution set
Answer: <em>x</em>∈(5,∞)
Step-by-step explanation:
x-7>-2=(x-7)+7>-2+7=<em>x</em>∈(5,∞)
To solve we need to group all the variables on one side, and all the constants on the other side.
Answer:
Step-by-step explanation:
