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mestny [16]
4 years ago
5

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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