Question

(х +5) •6+(х-3)^226-а^2-(5-а)^2​

Answer 1

Ответ:

Пошаговое объяснение:

6x + 30 + x² - 6x + 9 = x² + 39

26 - a² - 25 + 10a - a² = -2a² + 10a + 1

Answer 2

(х +5) •6+(х-3)^2= 6x+30+x^2-6x+9=39+x^2

26-а^2-(5-а)^2=26-a^2-(25-10a+a^2)=-2a^2+10a+1

Answer 3

To simplify the given expression, let's start by expanding the second term:

(х + 5) • 6 + (х - 3)^2 - а^2 - (5 - а)^2

Step 1: Expand the square (х - 3)^2 (х - 3)^2 = (х - 3)(х - 3) = х^2 - 6х + 9

Step 2: Expand the square (5 - а)^2 (5 - а)^2 = (5 - а)(5 - а) = 25 - 10а + а^2

Now, the expression becomes:

6(х + 5) + (х^2 - 6х + 9) - а^2 - (25 - 10а + а^2)

Step 3: Distribute the 6 into (х + 5) 6(х + 5) = 6х + 30

Now, the expression becomes:

6х + 30 + (х^2 - 6х + 9) - а^2 - (25 - 10а + а^2)

Step 4: Combine like terms Combine the х^2 and -6х terms:

6х + 30 + х^2 - 6х + 9 - а^2 - 25 + 10а - а^2

Step 5: Combine the constant terms Combine the constant terms - а^2 and -а^2, and -25 and 9:

6х + х^2 - а^2 - а^2 + 30 - 16 + 10а

Step 6: Simplify further Combine the remaining like terms:

х^2 + 6х - 2а^2 + 10а + 14

So, the simplified expression is:

х^2 + 6х - 2а^2 + 10а + 14