3 years ago

Can someone please help me with question 3 and 4

Mathematics

1 answer:

storchak [24]3 years ago

7 0

3. it would be 15 because it is multiplying by 3

4. it would be 11 because it's subtracting 2

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madreJ [45]

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Step-by-step explanation:

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Using Pythagoras

$x^{2} + (x+5)^{2} = (x+8)^{2}\\x^{2} + x^{2} + 10x +25 = x^{2} + 16x + 64\\x^{2} + x^{2} - x^{2} + 10x - 16x + 25 - 64 = 0\\x^{2} - 6x -39 = 0$

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