Question

Pls help me 20 POINTS

Answer 1

Answer:

Step-by-step explanation:

1) (y - 1)²

   1. y*y =y²

   2. 2(y)(-1)= -2y

   3 . (1)(1) = 1

(y-1)² = y² - 2y + 1

2) (6y + 3)²

    1. (6y)(6y) = 36y²

    2. (2)(6y)(3)=36y

    3. (3)(3)   = 9

(6y + 3)² = 36y² + 36y + 9

3) (4x - y)²

    1. (4x)(4x) = 16x²

    2. (2)(4x)(-y) = -8xy

    3. (y)(y) = y²

(4x -y)² = 16x² - 8xy + y²

4) (y - 12)²

 1.(y)(y) = y²

 2. (2)(y)(-12) = -24y

 3. (12)(12) = 144

(y - 12)² = y² - 24y + 144

$(x + \dfrac{1}{3})^{2}\\\\ 1. (x)(x) =x^{2}\\\\ 2. (2)(x)(\dfrac{1}{3})=\dfrac{2}{3}x\\\\\\ 3. (\dfrac{1}{3})(\dfrac{1}{3})=\dfrac{1}{9}\\\\\\(x +\dfrac{1}{3})^{2}=x^{2}+\dfrac{2}{3}x+\dfrac{1}{9}$

6) (ab +c)²

   1.(ab)(ab) = a²b²

   2. (2)(ab)(c)=2abc

   3. (c)(c)=c²

(ab+c)² = a²b² + 2abc + c²