Question

(x + 3) (x - 4) = ?*

1️⃣ x² - x + 12
2️⃣ x² + x - 12
3️⃣ x² - x - 12
4️⃣ x² + x +12

Answer 1

Step-by-step explanation:

3.x^2-x-12

is the answer

Answer 2

Concept:

The product of two linear factor expression gives quadratic polynomial.

If the distribution of multiplication over addition solved then we get quadratic polynomial

Given:

We have given product of two linear factors (x+3)(x-4)

Find:

We are ask to determine the product of the factors

Solution:

Apply the distribution of multiplication over addition on given linear factors (x+3)(x-4)

$(x+3)(x-4)=x^2-4x+3x-12$

Simplify we get

$(x+3)(x-4)=x^2-x-12$

Therefore the answer is $x^2-x-12$

Hence the correct option is (3).