Question

please solve these questions​

Answer 1

Step-by-step explanation:

this may help you please follow me and give thanks and mark as brainlist..

Answer 2

Answer:

I'm just answering 1st one

Step-by-step explanation:

(5x+7)(3x+4)

= 5x(3x+4)+7(3x+4)

=5x*3x+5x*4+7*3x+7*4

=15x^2+20x+21x+28

=15x^2+(20+21)x+28

=15x^2+41x+28

* means mutiply and x^2=x*x

if you would understand this solution then u can solve the others very easily