Answer:
see below
Step-by-step explanation:
The difference of 7 and x is 7-x. The difference of x and 7 is x -7. If you want the positive difference regardless of which (7 or x) is larger, you can make the difference be positive by using the absolute value: |x -7|.
We want numbers such that this difference is 4, so we want the solutions to ...
|x-7| = 4
Answer:
Step-by-step explanation:
Quadratic formula: when the equation is
The given equation is . Let's first arrange this so its format looks like
:
Subtract 1 from both sides of the equation
Now, we can easily identify 3 as a, -2 as b and 0 as c. Plug these into the quadratic formula:
I hope this helps!
Answer:
Step-by-step explanation:
The simplified expression is ...
3x(x -12x) +3x² -2(x -2)²
= 3x(-11x) +3x² -2(x² -4x +4) . . . . . simplify contents of parentheses
= -33x² +3x² -2x² +8x -8 . . . . . . . .eliminate parentheses
= (-33 +3 -2)x² +8x -8 . . . . . . . . . . group the coefficients of like terms
= -32x² +8x -8
