Answer:
Step-by-step explanation:
<h3>Hope it is helpful....</h3>
3x(9x² + 11x - 5) + 2(2x³ + 11x - 5x²) - 5x² + 8
Simplify.
27x³ + 33x² - 15x + 4x³ + 22x - 10x² - 5x² + 8
Add like terms.
(27x³ + 4x³) + (33x² - 10x²) + (-15x + 22x) + 8
Simplify.
31x³ + 23x² - 7x + 8
~Hope I helped!~
The value of expression when n = 3 is 22
<em><u>Solution:</u></em>
<em><u>Given expression is:</u></em>
We have to find the value of expression when n = 3
<em><u>Substitute n = 3 in given expression</u></em>
Thus the value of expression when n = 3 is 22
Answer:
B.
Step-by-step explanation:
Step 1: Cross-multiply
x² + 2x = 4x²
Step 2: Isolate <em>x</em>'s
2x = 3x²
0 = 3x² - 2x
Step 3: Factor
x(3x - 2) = 0
Step 4: Find roots
x = 0, x = 2/3
Step 5: Double check answers.
When you do so, you should see that only x = 0 works. And we have our answer!
