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3 years ago

Solve for x. PLZ WAIT FOR PHOTO

Mathematics

2 answers:

Snezhnost [94]3 years ago

7 0

Δ = b^2 - 4.a.c = 4 - 4.6.3 = -68< 0

rootΔ = root(-68)

no real solutions :) Cause -68 not positive.

Good Luck :)

Marrrta [24]3 years ago

7 0

The answer is b. because√-68 could be factorized in -2√17
so 2+- -2√17/12 is the same that 1+- -√17/6

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3 years ago

2x + y - z = -8

Andreyy89

Answer:

Multiply row 1 by $\frac{1}{2}$ .

Step-by-step explanation:

The augmented matrix of the system of linear equation is described below:

$\left[\begin{array}{cccc}2&1&-1&-8\\0&2&3&-6\\-\frac{1}{2} &1&1&-4\end{array}\right]$

Where $a_{11} = 2$ , if we need to create $a_{11} = 1$ , we need to multiply row 1 by $\frac{1}{2}$ , that is to say:

$\left[\begin{array}{cccc}1&\frac{1}{2} &-\frac{1}{2} &-4\\0&2&3&-6\\-\frac{1}{2} &1&1&-4\end{array}\right]$

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2 years ago

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2 years ago

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