3x+y=9
(a + b)^2?
Answer: (a + b)² = 50
Step-by-step explanation:
(a + b)² = (a + b)(a + b)
= a² + ab + ab + b²
So, (a + b)² = a² + b² + 2ab
Then substitute the value of ab and (a² + b²)
(a + b)² = 30 + 2(10)
= 30 + 20
Therefore, (a + b)² = 50
Answer:
a), b), c), d), e)
Step-by-step explanation:
Sean , y . A continuación, desarrollamos las siguientes operaciones:
a)
b)
c)
d)
e)
b)34^2+15x-25
c)27x+3
d)34x^2-15x-25
Answer:
d) 34x^2 - 15x -25
( (8x + 5) * (8x - 5) ) - 5x(6x +3 )
= 64x^2 - 25 - 30x^2 - 15x
= 34x^2 - 15x - 25