Question

simplify (y-3)² -(y+3)²​

Answer 1

Answer:

Question :-

• (y - 3)² - (y + 3)²

Answer :-

➠ (y - 3)² - (y + 3)²

➔ (y)²- 2.y.3 + (3)² - (y)² + 2.y.3 + (3)²

➔ y² - 6y + 9 - y² + 6y + 9

➔ 18

Answer 2

Answer:

$\mathbb\purple{SOLUTION}$

$\mathtt\pink {= {(y - 3)}^{2} - {(y + 3)}^{2} }$

We apply below rule to solve this.

$\mathtt\pink { ({a - b)}^{2} = {a}^{2} - 2ab + {b}^{2} }$

$\mathtt\pink{ ({a + b)}^{2} = {a}^{2} + 2ab + {b}^{2} }$

Now, solve the question by using these rules.

$\mathtt\pink { = {y}^{2} - 2 \times y \times \: 3 + {3}^{2} - ( {y}^{2} + 2 \times y \times 3 + {3}^{2}) }$

$\mathtt\pink {= \: {y}^{2} - 6y + 9 - ( {y}^{2} + 6y + 9) }$

$\mathtt\pink { = {y}^{2} - 6y + 9 - {y}^{2} - 6y - 9}$

$\mathtt\pink { = - 6y - 6y }$

$\mathtt\pink {= - 12y}$

Step-by-step explanation:

Hope this helps you.

# By Sparkly Princess