If A-3x^2 - 7x - 8,B = x^2 +8x-3 and C=6x + 2 then solve the expression : A-B+C and also find the value of the expression obtained for x = 2.
Please solve this question quickly
Answers
Answered by
0
Answer:
pls mark as brainliest
Step-by-step explanation:
a)A+B-C
=(3x²-7x-8)+(x²+8x-3)-(-5x²-3x + 2)
=3x²-7x-8+x²+8x-3+5x²+3x-2
=9x²+4x-13
b)A-B-C
=(3x²-7x-8)-(x²+8x-3)-(-5x²-3x+2)
=3x²-7x-8-x²-8x+3+5x²+3x-2
=7x²-12x-7
Answered by
0
Answer:
2x^2-9x+5 ,-5
Step-by-step explanation:
A-B-C
=3X^2-7X-X^2-8X+3+6x+2
=2x^2-9x+5( ans)
if x=2 then
2x^2-9x+5
=2×2^2-9×2+5
=2×4-18+5
=-5
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