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Q1 Find the difference of the expression and combine like terms.
(0.8x^2−0.3)−(−0.6x^2+2.4x^3−0.4)
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GPT-5 mini
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Step 1 — Write the expression:
(0.8x^2 − 0.3) − (−0.6x^2 + 2.4x^3 − 0.4)
Step 2 — Distribute the minus through the second parenthesis:
0.8x^2 − 0.3 + 0.6x^2 − 2.4x^3 + 0.4
Step 3 — Group like terms (order by degree):
(−2.4x^3) + (0.8x^2 + 0.6x^2) + (−0.3 + 0.4)
Step 4 — Combine the coefficients:
−2.4x^3 + 1.4x^2 + 0.1
Answer: −2.4x^3 + 1.4x^2 + 0.1
(0.8x^2 − 0.3) − (−0.6x^2 + 2.4x^3 − 0.4)
Step 2 — Distribute the minus through the second parenthesis:
0.8x^2 − 0.3 + 0.6x^2 − 2.4x^3 + 0.4
Step 3 — Group like terms (order by degree):
(−2.4x^3) + (0.8x^2 + 0.6x^2) + (−0.3 + 0.4)
Step 4 — Combine the coefficients:
−2.4x^3 + 1.4x^2 + 0.1
Answer: −2.4x^3 + 1.4x^2 + 0.1
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