completing the square | Revision Server | Page 1

hidden ferry Jan 25, 2024, 5:54 PM

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Can sm help me please

runic thorn Jan 25, 2024, 5:56 PM

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Take out a factor of 2 so it’s 2(x^2 +8x +3)

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Then you complete the square using the inside bracket ignore the outside two for now

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You have to halve 8 as it’s the x coefficient

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So you write (x + 4)^2

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And then square 4 to get 16

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You minus this and add the 3 to it tk get the constant

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Now you should have 2((x+4)^2 - 13)

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You can go from here

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And get a = 2

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B is 4

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C is -26

runic thorn Jan 25, 2024, 6:07 PM

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@hidden ferry

hidden ferry Jan 25, 2024, 6:22 PM

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OHHH okay i didnt know about factorising the 2

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thank you sm

#completing the square