Can you help me with my math homework

Question

asked Nov 14, 2020 192k views

1 Answer

Andriy Buday · Answer 1 · 2020-11-21T00:08:59+0000

Answer:

5) 5

6)

Zeros:
$x_1=-3\\x_2=-4$

7)
$x^(2)+11x-180=0\\(x+20)(x-9)=0$

Explanation:

5) You can factor the quadratic equation
-t^(2)-t+30 to solve it:

-(x-5)(x+6)=0

Then you obtain:

$x_1=5\\x_2=-6$

Choose the positive result.

6) You can factor out 2:

2(x^(2)+7x+12)=0

Factor the expression. Find the numbers that sum 7 and the their product is 12. These would be 3 and 4:

2(x+3)(x+4)

The zeros are:

$x_1=-3\\x_2=-4$

7) If you factor the quadratic equation
x^(2)+11x-180=0 you obtain:

(x+20)(x-9)=0

And the zeros are:

$x_1=-20\\x_2=9$

Therefore, the answers are the options 3 and 4:

x^(2)+11x-180=0 and
(x+20)(x-9)=0