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Sagot :
Answer:
- D. 25x⁴ + 30x³ + 29x² + 12x + 4
Step-by-step explanation:
- (5x² + 3x + 2)² =
- (5x² + 3x + 2)(5x² + 3x + 2) =
- 5x²(5x² + 3x + 2) + 3x(5x² + 3x + 2) + 2(5x² + 3x + 2) =
- 25x⁴ + 15x³ + 10x² + 15x³ + 9x² + 6x + 10x² + 6x + 4 =
- 25x⁴ + 30x³ + 29x² + 12x + 4
Correct choice is D
Answer:
D. 25x⁴ + 30x³ + 29x² + 12x + 4
Step-by-step explanation:
(5x² + 3x + 2)² =
(5x² + 3x + 2)(5x² + 3x + 2) =
5x²(5x² + 3x + 2) + 3x(5x² + 3x + 2) + 2(5x² + 3x + 2) =
25x⁴ + 15x³ + 10x² + 15x³ + 9x² + 6x + 10x² + 6x + 4 =
25x⁴ + 30x³ + 29x² + 12x + 4
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