Answer:
2 real solutions
Step-by-step explanation:
To determine the nature of the solutions use the discriminant
Δ = b² - 4ac
• If b² - 4ac > 0 then 2 real solutions
• If b² - 4ac = 0 the 2 real and equal solutions
• If b² - 4ac < 0 then no real solutions
Given
x² + 9x + 20 = 0 ← in standard form
with a = 1, b = 9, c = 20, then
b² - 4ac
= 9² - (4 × 1 × 20 ) = 81 - 80 = 1
Since b² - 4ac > 0 then there are 2 real solutions
Answer:
the first one in the picture
Step-by-step explanation:
8x8x8x8=4096
9x9x9x9=6561
4096x6561=26873856
72x72x72x72=26873856
Ans.5) you can re-write 3 3/10 as 33/10
Now, you have to find two numbers whose sum would be 33/10.
Try to fix the denominator, and change numerator...like
it would be 13/10 + 20/10 or 15/10 + 18/10.Ok..
You can do your 6th ques. in same manner.
Did you understand?Or not??
Answer:
x
Step-by-step explanation:
(x−y + x+y) / 2
2x / 2
x