Question

find the perimeter of an equilateral triangle having one its sides 3x+4y metres . plz plz solve

Answer 1

eq. tr. has equal sides
so 3x+4y×3=9x+12y

Answer 2

perimeter of triangle = sum of the sides (a+b+c)

Given: one side= 3x+4y metres

(3x+4y) + (3x+4y) + (3x+4y)first solve the first two sets

3x(3x+4y)+4y(3x+4y)

=9x^2 + 12xy + 12xy + 16y^2

= 9x^2 + 24xy + 16y^2 + (3x+4y)

= 9x^2(3x+4y) + 24xy(3x+4y) + 16y^2(3x+4y)

= 27x^3 + 36x^2y + 72x^2y + 96xy^2 + 38xy^2 + 64y^3

= 27x^3 + 108x^y + 134xy^2 + 64y^3

perimeter = 27x^3 + 108x^y + 134xy^2 + 64y^3