So we know this expression:
7x^2 + 2x.
And we know x = 3.
(7*3)^2 + (2*3)
21^2 + 6.
441 + 6
447
Answer: x=12
Steps shown in image below:
I dont know how to solve this but heres a suggestion: Use PEMDAS
Answer:
1. x² + 3x - 5 = 0
2. x² - x = 3 x + 7
4. 7x² + 14x = 0
Step-by-step explanation:
A Quadratic equation takes the form;
ax² + bx + c = 0
a, b, c are constants and a cannot be 0.
Options 1 fits this;
x² + 3x - 5 = 0
Option 2 fits this as well;
x² - x = 3 x + 7
x² -x - 3x - 7 = 0
x² - 4x - 7 = 0
Option 4 fits this as well if c = 0.
7x² + 14x + 0 = 0
Answer:
$24,240
Step-by-step explanation:
20,000 + 1,060 (5-1)
