(2a-3)2-2(2a-3)(a-1)+(a-1)2

2 min read Jun 16, 2024
(2a-3)2-2(2a-3)(a-1)+(a-1)2

Factoring the Expression (2a-3)2-2(2a-3)(a-1)+(a-1)2

This expression might look intimidating at first, but it's actually a perfect square trinomial in disguise. Let's break down how to factor it:

Recognizing the Pattern

The expression follows the pattern of a perfect square trinomial:

(x - y)2 = x2 - 2xy + y2

In our case:

  • x = (2a - 3)
  • y = (a - 1)

Applying the Pattern

Let's substitute these values into the pattern:

  • x2 = (2a - 3)2
  • 2xy = 2(2a - 3)(a - 1)
  • y2 = (a - 1)2

We can see that our expression matches the perfect square trinomial pattern perfectly!

Factoring the Expression

Now we can apply the pattern to factor the expression:

(2a - 3)2 - 2(2a - 3)(a - 1) + (a - 1)2 = [(2a - 3) - (a - 1)]2

Simplifying the Result

Let's simplify the factored expression:

  • [(2a - 3) - (a - 1)]2 = (2a - 3 - a + 1)2
  • (2a - 3 - a + 1)2 = (a - 2)2

Final Answer

Therefore, the factored form of the expression (2a-3)2-2(2a-3)(a-1)+(a-1)2 is (a - 2)2.

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