Answer:
1. 3x²+10x-8
2.10x²+17x+3
3.x²-15x+54
1. (x + 4) × (3x - 2)
First: x × 3x = 3x²
Outside: x × (-2) = -2x
Inside: 4 × 3x = 12x
Last: 4 × (-2) = -8
3x² - 2x + 12x - 8
2. (5x + 1) × (2x + 3)
First: 5x × 2x = 10x²
Outside: 5x × 3 = 15x
Inside: 1 × 2x = 2x
Last: 1 × 3 = 3
10x² + 15x + 2x + 3
3. (x - 6) × (x - 9)
First: x × x = x²
Outside: x × (-9) = -9x
Inside: (-6) × x = -6x
Last: (-6) × (-9) = 54
x² - 9x - 6x + 54
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Answers & Comments
Answer:
1. 3x²+10x-8
2.10x²+17x+3
3.x²-15x+54
Verified answer
Answer:
1. (x + 4) × (3x - 2)
First: x × 3x = 3x²
Outside: x × (-2) = -2x
Inside: 4 × 3x = 12x
Last: 4 × (-2) = -8
3x² - 2x + 12x - 8
= 3x² + 10x - 8
2. (5x + 1) × (2x + 3)
First: 5x × 2x = 10x²
Outside: 5x × 3 = 15x
Inside: 1 × 2x = 2x
Last: 1 × 3 = 3
10x² + 15x + 2x + 3
= 10x² + 17x + 3
3. (x - 6) × (x - 9)
First: x × x = x²
Outside: x × (-9) = -9x
Inside: (-6) × x = -6x
Last: (-6) × (-9) = 54
x² - 9x - 6x + 54
= x² - 15x + 54