1) x² + 8x + 15 = 0
Now what multiples to 15 and adds to 8? 5 and 3, 5x3=15, 5+3=8
so its
(x+5)(x+3)=0
now solve
x+5=0 x+3 =0
x = -5 x = -3
so the solution is -5, -3
4) x² - 11x + 28 = 0
what multiples to 28 and adds to -11? -7 and -4
(x-7)(x-4) =0
x= 7, 4
10) x² = 17x - 72 (okay ill do 3 of them)
first get numbers on same side where x² is positive
x² -17x + 72 = 0
what multiples to 72 and adds to -17? -9 and -8
(x-9)(x-8)=0
x= 9, 8
Thank you for posting your question here at brainly. I hope the answer will help you. Below is the equation <span>using multiplication and addition that shows the total area of a generic rectangle with dimensions 37 & 42:
1200 + 280 + 60 + 14 = 1554</span>
Answer:
15x+10
Step-by-step explanation:
Answer:
that means all the other sides are x-45 and each of the angles are 60 degrees
(i dont know what your asking for)
The ionic compound produced would be Aluminum Oxide or Al2O3.
- The answer is C