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azzarooni88

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- Thread starter azzarooni88
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- #1

azzarooni88

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- #2

Mark44

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What happened to your equation. You're starting with the determinant equalling 0. You lost one side of your equation.## Homework Statement

View attachment 225748

## Homework Equations

Cofactor expansion (along 1st column)

## The Attempt at a Solution

View attachment 225746

- #3

azzarooni88

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solving the determinant equal to 0What happened to your equation. You're starting with the determinant equalling 0. You lost one side of your equation.

- #4

Mark44

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If you're solving an equation, you have to actually have an equation.solving the determinant equal to 0

In your first line, you start off with "= ..." followed by a bunch of expressions. You seem to have lost one side of your equation.

- #5

azzarooni88

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I think my working is logical. I start off with 0=... and just don't continue writing 0 on the LHS as I solve for the RHS. Ultimately I get 0=xIf you're solving an equation, you have to actually have an equation.

In your first line, you start off with "= ..." followed by a bunch of expressions. You seem to have lost one side of your equation.

- #6

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I think my working is logical. I start off with 0=... and just don't continue writing 0 on the LHS as I solve for the RHS. Ultimately I get 0=x^{2}- x(b+a) +ab

Okay, can you solve that equation for ##x##?

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