(4x+5)(x-6)-(5x+7)(x+8) =?
Correct answer C. ?x2-34x-86
Tip: press A, B, C or D to answer, and N for the next question.
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See allIf (1/x-x)2 = 50 what is the value of 1/x2+x2
Correct answer C. 52
(1000002)2 – (999998)2
Correct answer C. 4000000
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Subtract 5×2-9x-10 from 8×2+10x-25
Correct answer B. 3x2 - 19x - 15
What is the sum of 3×3 + 7×2 – 7 and 5×2+8x-9?
Correct answer A. 3x3 + 12x2 + 8x - 16
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