A) (1+ 3y)2; (5x + y)2; (2x + 3)2 b) 2
1
x
2
 
  
  ;
2
1 1
x y
3 2
 
  
 
c) (5x + y) (5x - y); x y x y 2 2 2 2
5 5
  
    
   ; (a2 + 3)(3 – a2)

answer: standard form is ax^2 + bx + c = 0

step-by-step explanation:

standard form is ax^2 + bx + c = 0

(2x + 1)(x - 2) = 0

distribute to get into standard form

2x^2 - 4x + x - 2 = 0

2x^2 - 3x - 2 = 0

a = 2, b= -3, c = -2

a is your answer

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540

probably .5

i can on others if necessary.