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ayoismeisalex
26.12.2019 •
Mathematics
Which expressions represent a quadratic expression in factored form?
select all the correct answers.
x2 − x − 72
(x + 3)(x − 7)
-8(x + 56)
(x + 1)(x − 2)
(x − 2) + (x + 3)
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Ответ:
quadratic equation is 2 degree polynomial
x2 - x -72 = x2 - 9x +8x -72
x(x - 9 ) + 8(x - 9) = (x -9) (x+8)
1st correct - quadratic
2nd correct - quadratic
3rd - it's linear equation, not quadratic
4th - correct - quadratic
5th - linear - not correct
Ответ: