Question

50 points

Answer 1

Answer:

see below

Step-by-step explanation:

whenever there is negative number being squared, you need to add the brackets so that you inside the - 1 in front of the number

so this step is wrong

$\sqrt{ - 9 { }^{2} - 4(1)(20) }$

the -9 ² , you must include the brackets to include the -1 in front of the 9

so it should be

$\sqrt{( - 9) {}^{2} - 4(1)(20) }$

so you will get = 1

and then you continue with other parts of the formula and you will get real solutions

hope this helps

please mark it brainliest

Answer 2

Inside the radical should be 81-80 which would be 1 of course and that leaves real solutions. answers are 5 & 4