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dezoksy [38]
3 years ago
14

Helped needed asap 20 points!! and brainliest

Mathematics
1 answer:
jolli1 [7]3 years ago
7 0

ANSWER

1. No solution

2. 4 and 6

3. 81

EXPLANATION

1. The given quadratic equation is

{x}^{2}  + 1 = 0

This implies that:

{x}^{2}  =  - 1

There is no real number whose square is negative one.

This quadratic equation has no solution.

2. The given quadratic equation is

{x}^{2}  - 10x + 24 = 0

We split the middle term with -6,-4 because their product is 24 and their sum is -10

{x}^{2}  - 6x  - 4x+ 24 = 0

We factor by grouping

{x}(x  - 6)- 4(x - 6)= 0

(x  - 6)(x - 4)= 0

We have x=4 and x=6.

3. The given quadratic equation is

{x}^{2} - 18x = 7

We the square of half the coefficient of x to both sides of the equation.

(  -  \frac{18}{2} )^{2}  = ( { - 9)}^{2}  = 81

The correct choice is C.

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