What are the solution(s) to the quadratic equation x2 – 25 = 0?
2 answers:
Answer:
x = ± 5
Step-by-step explanation:
Given
x² - 25 = 0
There are 2 possible approaches to solving this equation
Approach 1
add 25 to both sides
x² = 25 ( take the square root of both sides )
x = ± = ± 5
Approach 2
x² - 25 ← is a difference of squares and factors as
(x - 5)(x + 5) = 0 ← in standard form
Equate each factor to zero and solve for x
x - 5 = 0 ⇒ x = 5
x + 5 = 0 ⇒ x = 5
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Hi there!
To find f(-2), we need to plug in the value x = -2 into the equation.
Remember that multiplying a negative by a positive ends up with a positive.
~ Hope this helps you!
To find f(-2), we need to plug in the value x = -2 into the equation.
Remember that multiplying a negative by a positive ends up with a positive.
~ Hope this helps you!