bob7220
29.07.2019 •
Mathematics
How many pounds of meat is needed for 1000 patties that weigh .25 pounds
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Ответ:
Ответ:
IF A = 3x² + 5x - 6 and B = -2x² - 6x + 7 then A - B equal is
The correct option is B
5x² + 11x - 13
Step-by-step explanation:
Given:
A = 3x² + 5x - 6 and
B = -2x² - 6x + 7
To Find :
(A - B) = ?
Solution:
A = 3x² + 5x - 6
B = -2x² - 6x + 7
Now,
( A -B ) = (3x² + 5x - 6 ) - (-2x² - 6x + 7 )
Now first minus sign will enter in the bracket ,
( - )×( - ) = +
( - )×( + ) = -
∴ ( A -B ) = (3x² + 5x - 6 ) + 2x² + 6x - 7
= 3x² + 2x² + 5x + 6x - 6 - 7
= 5x² + 11x - 13
∴ (A - B ) = 5x² + 11x - 13
Therefore,
IF A = 3x² + 5x - 6 and B = -2x² - 6x + 7 then A - B equal is
The correct option is B
(A - B ) = 5x² + 11x - 13