Question

answer the questions I will markup u as brainiest​

Answer 1

Answer:

which sum is this

Step-by-step explanation:

tell me

Answer 2

Answer:  Q7 . (B.)

                Q8. (iii)

Step-by-step explanation:

Q7.    (b.)

$(x-5)(x+8)\\x^{2} -5x+8x-40\\x^{2} +3x-40$                    { using $(x+a)(x-b)$  =  $x^{2} +(a+b)x+ab$ }

Q8.   (iii)

$(3x-8)^{2} \\9x^{2} +64-48x$                         {  using  $(a-b)^{2} =a^{2} +b^{2} -2ab$ }