4. If A = 3x2 + 5x - 8y2, B = x2 - 4x-2, C = -5x2 - 4x2 + 2 then find A + B + C.
Answers
Answered by
1
Step-by-step explanation:
A = 3x² + 5x - 8y²
B = x² - 4x - 2
C = -5x² - 4x² + 2
A + B + C
= 3x² + 5x - 8y² + x² - 4x - 2 - 5x² - 4x² + 2
= 3x² + x² - 5x² - 4x² - 8y² + 5x - 4x - 2 + 2
= -5x² - 8y² + x
Answered by
0
Answer:
A = 5x−8y
2
+6
B =x
2
+8
C = 4
Ste by-step explanation:
A = 3x2 + 5x - 8y2
3x2 + 5x - 8y2
Multiply 3 and 2 to get 6.
6+5x−8y 2
B = x2−4×−2
Multiply 4 and −2 to get −8.
x
2
−(−8)
C = 5×2−4×2+2
Multiply 5 and 2 to get 10.
10−4×2+2
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