Rewrite the followings using ‘if, then’:' (iii) x > y `rarr` x + 5 > y + 5

Find the following squares by using the identities. (2xy + 5y)^2

Find the following squares by using the identities. (6x^2 - 5y)^2

Factorise the following expressions. 5x^2y - 15xy^2

Write the solution of the equation 5x-10y+5=0 and x-2y+1=0 .

Solve the following sysytem of linear equations using matrix method :- 5x + 2y = 4 7x + 3y = 7 .

Find the sum of the following series up to the specified term (x-y) + (2x-3y) + (3x-5y)+ ….. upto nth term.