Question

(2x+1) (2x-5) Find the product by suitable property . ​

Answer 1

Answer:

4x² + 2x -5 is ur answer .

Step-by-step explanation:

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Answer 2

Answer:

4x² -4x - 5

Step-by-step explanation:

=> (2x + 1)(2x - 5)

=> (2x + 1)(2x + (-5))

We know that, (x + a)(x + b) = (x)² + (a + b)x + ab.   .   .  (i)

where,

• x is the common term in the 2 brackets
• a and b are the variables

Here,

• x => 2x
• a = 1, b = -5

Using the identity (i) :-

=> (2x + 1)(2x - 5) = (2x)² + (1 + [-5])x + 1 x (-5)

= 4x² + (1 - 5)x -5

= 4x² -4x - 5