kandicelima01
02.10.2020 •
Mathematics
Rewrite the equation by completing the square.
x2 + 3x – 28 = 0
(x +
)2 =
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Ответ:
Step-by-step explanation:
x2 + 3x – 28 = 0
x^2+7x-4x-28=0
x (x+7)-4(x+7)=0
x-4)(x+7)=0
x=4
x=-7
Ответ:
−40+44i is equivalent to (4+6i)(2+8i)