3 years ago

Greg's found 72-24 first be subtracted 20 because he think it was easier.Use words and numbers to explain greg's answer

Mathematics

1 answer:

omeli [17]3 years ago

4 0

answer:

its correct as long as he subtracts 4 after that.

Step-by-step explanation:

That is because if you only subtract part of the first number, the answer will be wrong. and the question is also written a bit wierd.

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Consider 8x2 - 48x = -104.

ki77a [65]

Answer:

$3+ 2\mathbf{i}$

$3- 2\mathbf{i}$

Step-by-step explanation:

Quadratic Equation Solving

We have the equation:

$8x^2-48x=-104$

Divide by 8:

$x^2-6x=-13$

Now complete the squares so the left side is a perfect square of a binomial:

$x^2-6x+9=-13+9=-4$

Factoring the perfect square:

$(x-3)^2=-4$

Taking the square root:

$x-3=\sqrt{-4}$

The square root of a negative number is an imaginary number:

$x-3=\pm 2\mathbf{i}$

Solving for x:

$x=3\pm 2\mathbf{i}$

The solutions are:

$3+ 2\mathbf{i}$

$3- 2\mathbf{i}$

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mixas84 [53]

Answer:

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Step-by-step explanation:

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⋅

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Make a ten to add. 3+7+9=

andre [41]

You can add 7+3 then add 9 ad you get 19

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