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3 years ago

11

Solve 2-3x=-x-8 i need help on this question i cant solve this

1 answer:

Nikitich [7]3 years ago

4 0

Answer:

$x=5$

Step-by-step explanation:

We start by adding $3x$ to both sides, giving $2-3x+3x=-x+3x-8$ , which after simplifying gives $2=2x-8$ .

We then add $8$ to both sides, giving $2+8=2x-8+8$ , which after simplifying gives $10=2x$ .

We can then divide both sides by $2$ , giving $10/2=2x/2$ , which after simplifying gives $5=x$ , or $x=5$ . So, x is 5.

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Step-by-step explanation:

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3 years ago

Factor 16x^2 + 49. Check your work.

Shtirlitz [24]

Answer:

$16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

Step-by-step explanation:

Given : Expression $16x^2+49$

To find : Factor the expression ?

Solution :

The given expression is a quadratic function $y=ax^2+bx+c$ the solution is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

On comparing with general form,

a=16, b=0, c=49

Substitute in the formula,

$x=\frac{-0\pm\sqrt{0^2-4(16)(49)}}{2(16)}$

$x=\frac{\pm\sqrt{-3136}}{32}$

$x=\frac{\pm56i}{32}$

$x=\frac{56i}{32},\frac{-56i}{32}$

$x=\frac{7i}{4},\frac{-7i}{4}$

Factors are $(x-\frac{7i}{4}),(x+\frac{7i}{4})$

Therefore, $16x^2+49=(x-\frac{7i}{4})(x+\frac{7i}{4})$

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4 years ago

kherson [118]

Answer:

6000cm

Step-by-step explanation:

multiply all figures given

7 0

2 years ago

olya-2409 [2.1K]

Answer:

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Step-by-step explanation:

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