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# The roots of $7x^2 + x - 5 = 0$ are $a$ and $b.$ Compute $(a - 4)(b - 4).$

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The roots of $7x^2 + x - 5 = 0$ are $a$ and $b.$ Compute $(a - 4)(b - 4).$

Jun 15, 2022

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Jun 15, 2022

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The roots of 7x^2 + x - 5 = 0 are $$\frac{-1 \pm \sqrt{141}}{14}$$

Plugging these in, you get (a - 4)(b - 4) = 115/7.

Jun 15, 2022
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It's not correct :(

Blizzardshine  Jun 15, 2022
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