Answer:
x = - 3 or x = 7
Step-by-step explanation:
Given
f(x) = x² - 4x + 6
If f(x) = 27, then equating gives
x² - 4x + 6 = 27 ( subtract 27 from both sides )
x² - 4x - 21 = 0 ← in standard form
Consider the factors of the constant term ( - 21) which sum to give the coefficient of the x- term ( - 4)
The factors are - 7 and + 3, since
- 7 × 3 = - 21 and - 7 + 3 = - 4, hence
(x - 7)(x + 3) = 0
Equate each factor to zero and solve for x
x + 3 = 0 ⇒ x = - 3
x - 7 = 0 ⇒ x = 7
Thats really easy but i need to go to school i will help when im back
Answer:
1/(u-3)
Step-by-step explanation:
(u+3)/(u^2-9)
(u+3)/[(u+3)(u-3)]
cancel out the (u+3)'s,
you get 1/(u-3).
Answer:1/5
Step-by-step explanation:if he has 2 red apples and 10 blue it would be 2/10 and that simplified which is dividing it in half would make it 1/5
<span>Moxie wants to have $5000. how much money does she have to deposit in an account at 6% interest, compounded 3 times per year, in order to have $5000 at the end of 6 years? The formula for compound interest AMOUNT is
A = P (1 + r/n)^(nt),
where P is the principal and must be calculated here; A is the amount Moxie wants to have after 6 years, and is $5000; r is the annual interest rate, expressed as a decimal fraction: 0.06; n is the number of compounding periods per year, which here is 3; and t is the time, in years, here equal to 6.
Solve the following for P: $5000 = P (1 + 0.06/3)^(3*6)
Hint: $5000 = P (1.02)^18
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