Please help me! I will fan and medal =D

Question

xkayleex · Answer

What is the factored form of x^2 - 196

xkayleex · Answer

What is the factored form of 49x^2-56x+16?

xkayleex · Answer

Or at least tell me what I could do to solve them please. =D

welshfella · Answer

what is the square root of 196?

xkayleex · Answer

14

welshfella · Answer

what you have here is the difference of 2 squares  x^2 and 196 are perfect squares

xkayleex · Answer

Oh

welshfella · Answer

ok  the general  form is 

x^2 - b^2 = (a + b)(a - b)

so plug in a = x and b = 14 and you have it.

welshfella · Answer

that general form is worth committing to memory.

xkayleex · Answer

(x+14)(x−14)

xkayleex · Answer

Thanks can you help me with the second one please? =D

welshfella · Answer

Ok  
this one is a perfect square 
note that  49x^2 and + 16 are both perfect squares   but  this is not a difference 

can you figure it out /

welshfella · Answer

both factors are the saME.

welshfella · Answer

- BUT  on expansion they produce a middle term + 56x.