Question

Q7 The cost of a chocolate is Rs (x + y) and Rohit bought (x + y) chocolates. Find the total amount paid by him in terms of x. If x = 10 find the amount paid by him.​

Answer 1

Answer:

total amount paid by him: $y^{2}+20y+100$

Step-by-step explanation:

total amount paid by him = (x + y)(x + y) = $(x +y)^{2}$

now if x = 10 then we can write

$(x+y)^{2}$ = $(10+y)^{2}$ = $y^{2} + 20y+100$