Question

A^2-5a\a+6 - 36-5a\a+6упростите его и найдите значение выражения при а=216

Answer 1

$\frac{a^{2}-5a }{a+6}-\frac{36-5a}{a+6}=\frac{a^{2}-5a-36+5a }{a+6} =\frac{a^{2}-36}{a+6}=\frac{(a+6)(a-6)}{a+6}=a-6\\\\a=216\\\\a-6=216-6=210$

Answer 2

To simplify the expression (A^2 - 5a)/(a + 6), we can factor the numerator and simplify if possible. The expression can be rewritten as follows:

(A^2 - 5a)/(a + 6)

First, let's factor the numerator (A^2 - 5a):

(A^2 - 5a) = a(A - 5)

Now, the expression becomes:

a(A - 5)/(a + 6)

Next, we can cancel out the common factor of 'a' in the numerator and denominator:

a(A - 5)/(a + 6) = (A - 5)/(a + 6)

Now that we have simplified the expression, we can find its value when a = 216:

Let's substitute a = 216:

(A - 5)/(a + 6) = (A - 5)/(216 + 6) = (A - 5)/222

Since we don't have the specific value of A, we can't provide the final numerical answer without knowing the value of A. But now you have the simplified expression, and you can evaluate it for any given value of A.