Question

Express 20a² - 45b² in the form of (a+b)(a-b)​

Answer 1

Step-by-step explanation:

By simplifying further the above equation is 5(4a

2

−9b

2

)

By using the formula a

2

−b

2

=(a+b)

Now solving for the above equation

5(4a

2

−9b

2

)=5((2a)

2

−(3b)

2

)=5(2a+3b)(2a−3b)