Question

(3х – 1)(3х + 1) – 4х 2

Answer 1

...= 9х²-1-4х
вродь так

Answer 2

To simplify the given expression, let's start by expanding the terms within the parentheses and then combining like terms:

(3x - 1)(3x + 1) - 4x^2

To expand the expression, use the FOIL method (First, Outer, Inner, Last):

First: 3x * 3x = 9x^2 Outer: 3x * 1 = 3x Inner: -1 * 3x = -3x Last: -1 * 1 = -1

Now, rewrite the expression with the expanded terms:

(9x^2 + 3x - 3x - 1) - 4x^2

Notice that the "3x" and "-3x" terms cancel each other out. Now, combine the remaining like terms:

9x^2 - 1 - 4x^2

To further simplify, combine the x^2 terms:

(9x^2 - 4x^2) - 1

5x^2 - 1

So, the simplified expression is 5x^2 - 1.