Answer:
The right answer is 0 < m - 3/4 < 3
Step-by-step explanation:
3/4 < m < 3 3/4
The error is 3/4, m, and 3 3/4 has to substract 3/4
3/4 - 3/4 < m - 3/4 < 3 3/4 - 3/4
The right answer is
0 < m - 3/4 < 3
The work inside parentheses cannot be carried out as shown, so the next approach to consider is multiplying the expressions inside the parentheses by -5 and 5 respectively:
-5 + 25x - 40x - 10 = -4x - 8x (Are you sure it's really "-4x - 8x"?)
Combining the x-terms:
-5 - 15x - 10 = -12x
Combining all like terms: -15 = 3x, so that x = -5 (answer)
Add 2x to both sides,
3x+9=18
Subtract 9 from both sides. 3x=9
Divide both sides by 3.
x=3
Subtract -1 on both sides to get equation into standard form
2x^2 - 4x + 5.
The C value would be 5