Question

(2x+5y) (3x+5y) - (7x+3y) (3y-7x)​

Answer 1

Answer:

Step-by-step explanation:

(2x+5y) (3x+5y) - (7x+3y) (3y-7x)

= 6x^2+10xy+15xy+25y^2-(21xy-49x^2+9y^2-21xy

= 6x^2+10xy+15xy+25y^2-21xy+49x^2-9y^2+21xy

= 55x^2+25xy+25y^2-21xy-9y^2+21xy

= 55x^2+25xy+25y^2-9y^2

= 55x^2+25xy+16y^2 ans

Answer 2

Answer:

$55x ^{2} + 25xy + 16y ^{2}$

Step-by-step explanation:

(2x+5y)(3x+5y) - (7x + 3y) (3x-7x)

$(6x {}^{2} + 10xy + 15xy + 25y {}^{2} ) - ( - 49x {}^{2} + 9y {}^{2} ) \\ 55x {}^{2} + 25xy + 16y {}^{2}$