Thejollyhellhound20
25.07.2019 •
Mathematics
Give the values of a, b, and c needed to write the equation's general form. 2/3(x-4)(x+5)=1 a) a = 2/3; b = 1; c = -20 b) a = 2; b = 2; c = 43 c) a = 2; b = 2; c = -43
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Ответ:
c) (A, B, C) = (2, 2, -43)
Step-by-step explanation:Multiply the given equation by 3:
... 2(x -4)(x +5) = 3
Multiply the binomial terms:
... 2(x^2 -4x +5x -20) = 3
Collect terms and use the distributive property:
... 2x^2 +2x -40 = 3
Subtract 3 to put into general form:
... 2x^2 +2x -43 = 0
The coefficients A, B, C are the coefficients of the general form equation, left to right:
... A = 2; B = 2; C = -43 . . . . matches selection c)
Ответ: