Question

if A=3x²+5x-8y²,B=x²-4x-2 and C=-5x²-4x²+2, then find A+B+C​

Answer 1

Answer:

4x² + 6x - 10

Step-by-step explanation:

Given : A = 3x² - 4x + 1   ;  B = 5x² + 3x - 8   ;   C = 4x² - 7x + 3

To find: (A + B) - C

Solution :

A + B = 3x² - 4x + 1 + 5x² + 3x - 8

        = 3x²+ 5x² - 4x + 3x  - 8 + 1  

        =  8x² - x - 7

(A + B) - C = 8x² - x - 7 - (4x² - 7x + 3)

               = 8x² - x - 7 - 4x² + 7x - 3

               =  4x² + 6x - 10

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