Question

a square - 7a - 12
dont give rubbish answer​

Answer 1

Step-by-step explanation:

I  cant understand that it is -7 or 7

so I will do both -7 & 7 Ok

1) I will put -7 .

-7a² - 12²  = 0

49a  -  144  = 0

49a = 0 - 144

49a = -144

a = -144/49

a = -2.638  

2) I will put 7.

7a - 12 = 0

49a - 144 = 0

49a  = 0 + 144

49a = 144

a = 144/49

a = 2.638                      

                                                   if I am right please thank me .