Respuesta :

You already know that:

a²-b²=(a-b)(a+b)

Thus:

16-49x²=4²-(7x)²=(4-7x)(4+7x)

Answer:

Step-by-step explanation:

a²-b²=(a-b)(a+b)

Thus:

16-49x²=4²-(7x)²=(4-7x)(4+7x)