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jflandersneongr
06.01.2020 •
Mathematics
Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar.
y= x^2- 2x - 19
y + 4x = 5
the pair of points representing the solution set of this system of equations is (-6, 29) and
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Ответ:
answer:
(4, - 11)
step-by-step explanation:
given the 2 equations
y = x² - 2x - 19 → (1)
y + 4x = 5 → (2)
substitute y = x² - 2x - 19 into (2)
x² - 2x - 19 + 4x = 5, that is
x² + 2x - 19 = 5 ( subtract 5 from both sides )
x² + 2x - 24 = 0 ← in standard form
(x + 6)(x - 4) = 0 ← in factored form
equate each factor to zero and solve for x
x + 6 = 0 ⇒ x = - 6
x - 4 = 0 ⇒ x = 4
substitute these values into (2) and solve for y
x = - 6 : y - 24 = 5 ⇒ y = 29 ⇒ (- 6, 29 )
x = 4 : y + 16 = 5 ⇒ y = - 11 ⇒ (4, - 11 )
the solutions are (- 6, 29 ) and (4, - 11 )
Ответ:
answer:
im not sure
step-by-step explanation:
Ответ: