2a) (- 10x⁴ + 6) + (8x⁴ + 14) = - 10x⁴ + 6 + 8x⁴ + 14 = 20 - 2x⁴
2б) (12a - 5) - ( 25 - 15a) = 12a - 5 - 25 + 15a = 27a - 30
2в) (10 + a) - (3a - 35) + 5a = 10 + a - 3a + 35 + 5a = 3a + 45
3) 4x + (5x - 3) - (3x + 2) = 4x + 5x - 3 - 3x - 2 = 6x - 5
Если x = 1,5 , то :
6 * 1,5 - 5 = 9 - 5 = 4
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2a) (- 10x⁴ + 6) + (8x⁴ + 14) = - 10x⁴ + 6 + 8x⁴ + 14 = 20 - 2x⁴
2б) (12a - 5) - ( 25 - 15a) = 12a - 5 - 25 + 15a = 27a - 30
2в) (10 + a) - (3a - 35) + 5a = 10 + a - 3a + 35 + 5a = 3a + 45
3) 4x + (5x - 3) - (3x + 2) = 4x + 5x - 3 - 3x - 2 = 6x - 5
Если x = 1,5 , то :
6 * 1,5 - 5 = 9 - 5 = 4