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Mathematics
, 02.02.2020 21:57
lilsnsbsbs
Transform the polynomial into a perfect square trinomial to solve
x^2-4x=5
a){-5,13}
b){-7,11}
c){1,7}
d){-1,5}
Answers: 2
Show answers
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Answer from:
mrme41
X² - 4x = 5 ⇒ x² - 4x - 5 = 0
x² ⇒ x * x
-5 ⇒ -5 * 1
-4 ⇒ -5 + 1
(x + 1)(x - 5) = x(x-5) + 1(x-5)
x² - 5x + 1x - 5 = x² - 4x - 5
x + 1 = 0
x = -1
x - 5 = 0
x = 5
y = x² - 4x - 5
y = -1² - 4(-1) - 5
y = 1 + 4 - 5
y = 5 - 5
y = 0
y = x² - 4x - 5
y = 5² - 4(5) - 5
y = 25 - 20 - 5
y = 0
Answer from: Quest
i'm pretty sure it's 477,585,296, but perhaps my math is incorrect.
Answer from: Quest
3201
step-by-step explanation:
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You know the right answer?
Transform the polynomial into a perfect square trinomial to solve
x^2-4x=5
a){-5,13}
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