Question

(а-9)²-(81+2а)упростить​

Answer 1

${a}^{2} - 18a + 81 - 81 + 2a$

=

$a {}^{2} + 16a$

Answer 2

To simplify the expression (а-9)² - (81 + 2а), follow these steps:

Step 1: Expand the square (а-9)²: (а-9)² = (а-9) * (а-9) = а² - 18а + 81

Step 2: Distribute the negative sign to the second term (81 + 2а): -(81 + 2а) = -81 - 2а

Now, the simplified expression is: а² - 18а + 81 - (-81) - (-2а)

Step 3: Combine like terms: а² - 18а + 81 + 81 + 2а

Step 4: Simplify further: Combine the 'а' terms: а² - 16а + 162

So, the simplified expression is: а² - 16а + 162.