Question

Efectuati: a.(x+y)² b.(a+t)² c.(x+2)² d.(b+3)² e.(a+5)² f.(3+t)² g.(4+m)² h.(9+a)² i.(y+20)² j.(3x+2y)² k.(3+5x)²
DAU COROANA
VA ROG MMMMULTTTTTTTTTTT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

a.(x+y)² = x² + 2xy + y²

b.(a+t)²  = a² + 2at + t²

c.(x+2)²  = x² + 2x * 2 + 2² = x² + 4x + 4

d.(b+3)² =  b² + 2b * 3 + 3² = b² + 6b + 9

e.(a+5)²  = a² + 2a * 5 + 5² =  a² + 10a + 25 

f.(3+t)²  = 9 + 6t + t² = t² + 6t + 9 

g.(4+m)² = m² + 8m + 16 

h.(9+a)² = a² + 18a + 81

i.(y+20)² = y² + 2y * 20 + 20² = y² + 40y + 400

 j.(3x+2y)²  = (3x)² + 2*3x*2y + ( 2y)² = 9x² + 12xy + 4y²

k.(3+5x)² = 9 + 30x + 25x² = 25x² + 30x + 9