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2 answers:
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Answer:
Replacing x = 1 in the equation above, we have: (4x1) + 22 = 13
=> 5 +22 = 13 => 27 13
So 27 is not equal to 13 => x=1 is not a solution to 4x+22 = 13.
Step-by-step explanation:
Answer:
see explanation
Step-by-step explanation:
Given
x² - 9x + 4 = 0 ( subtract 4 from both sides )
x² - 9x = - 4
Using the method of completing the square
Add ( half the coefficient of the x- term )² to both sides
x² +2 (- )x +
= - 4 +
(x - )² =
Take the square root of both sides
x - = ±
= ±
Add to both sides
x = ±
← exact solutions