Question

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Answer 1

Відповідь:

1) 0,7²а²-13² +0,51а² = 0,49а²+0,51а²-169 = а²-169 = (а+13)(а-13)

2) 5b²+9-4b²=b²+9

3) 2x²-(x²-1) = 2x²-x²+1 = x²+1

4) 9a²-1-17a² = -8a²-1 = -(8a²+1)

5) 100x²-(25x²-16) = 100x²-25x²+16 = 75x²+16

6) ((c³)² - b²)(c⁶+b²) = (c⁶-b²)(c⁶+b²) = (c⁶)² - (b²)² = c¹² - b⁴

7) (x²-y²)(x²+y²) = (x²)²-(y²)² = x⁴-y⁴

8) (2²a²-b²)(4a²+b²) = (4a²-b²)(4a²+b²) = 4²(a²)²-(b²)² = 16a⁴-b⁴

9) 9m²-4+4 = 9m²

10) 6x²-(x² - 0.25) = 6x²-x²+0.25 = 5x² + 0.25