Enter the numbers in the boxes to complete the sentence below. The difference (-2x3 + 9x2 + 5) - (5x3 + 4x2 - 8x - 1) is equal to?
回答 (8)
2017-01-19 1:17 am
✔ 最佳答案
(-2x3 + 9x2 + 5) - (5x3 + 4x2 - 8x - 1)= - 7x^3 - 5x^2 + 8x + 6
2017-01-19 1:09 am
(-2x³ + 9x² + 5) - (5x³ + 4x² - 8x - 1)
= -2x³ + 9x² + 5 + 5x³ - 4x² + 8x + 1
= (-2x³ + 5x³) + (9x² - 4x²) + 8x + (5 + 1)
= 3x³+ 5x² + 8x + 6
= -2x³ + 9x² + 5 + 5x³ - 4x² + 8x + 1
= (-2x³ + 5x³) + (9x² - 4x²) + 8x + (5 + 1)
= 3x³+ 5x² + 8x + 6
2017-01-19 1:05 am
Is x a variable or does it stand for multiplication?
Does -2x3 mean -2·3 or -2x³?
Does -2x3 mean -2·3 or -2x³?
2017-01-19 3:20 am
- 7x³ + 5x² + 8x + 6
2017-01-19 3:14 am
(-2x^3+9x^2+5)-(5x^3+4x^2-8x-1)
=( -2x^3 + 9x^2 + 5 - 5x^3 -4x^2 + 8x + 1)
=-7x^3 + 5x^2 + 8x +6
=( -2x^3 + 9x^2 + 5 - 5x^3 -4x^2 + 8x + 1)
=-7x^3 + 5x^2 + 8x +6
2017-01-19 1:42 am
-7x^3 + 5x^2 + 8x + 6. Keep like terms together and subtract...don't forget the minus sign in the middle, that goes with the entire second parenthesized expression.
2017-01-19 1:08 am
Use ^ symbol to denote exponents:
(−2x^3 + 9x^2 + 5) − (5x^3 + 4x^2 − 8x − 1)
−2x^3 + 9x^2 + 5 − 5x^3 − 4x^2 + 8x + 1
−7x^3 + 5x^2 + 8x + 6
2017-01-19 1:08 am
Use the carrot, ^ to indicate exponents, otherwise, people won't give you the correct answer.
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