Please help ASAP!!!!

Mathematics

2 answers:

Marina CMI [18]4 years ago

5 0

$Luis\: didn't\: solve\: the\: function\: properly, because\: in\: line\: 4: \sqrt{16} = 4, instead \: he \: wrote \: \sqrt{16} = \sqrt{4}$

nata0808 [166]4 years ago

5 0

Answer:

Luis didn't solve the question properly.

Line 4 is not correct.

Step-by-step explanation:

We have given a quadratic equation.

-x²+10-21 = y

The question is solved in given pic.

The quadratic formula is applied to given equation.

Line 4 is not correct because √16 ≠ √4

Line 4 : x = -10±4 / (-2)

x = -10+4 / (-2) ; x = -10-4 / (-2)

x = -6/-2 ; x = -14/-2

x = 3 ; x = 7 which is correct answer.

Luis didn't solve the question properly.

Line 4 is not correct.

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Answer:

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Step-by-step explanation:

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