Answer:
Explanation:
Expanding double brackets is easy. Let me give u an example :
(x+5)(x+1)
so the way i do it is
1.Write the second bracket (x+1) twice :
(x+1) (x+1)
2. split the first bracket (x+5) like this :
x(x+1) +5(x+1)
3. Simplify
x*x = x²
x*1 = 1x
5*x = 5x
5*1 = 5
x² + 1x + 5x + 5 = x² + 6x + 5
so the final answer is gonna be x² + 6x + 5
in order to factorize it, u basically do the following :
1. Find two numbers, that multiply to give the last number (a.k.a 5 ) and add to give the middle number (a.k.a 6) The middle number is the sum, and the last number is the product.
so u write all the combo's that make the number 5 :
1 x 5
The two number's are gonna be 1 & 5, because 1 + 5 = 6 (the sum) and 1 x 5 = 5 (the product)
This example is easy since it doesn't include any negative numbers, so u just do = (x+1) (x+5) or (x+5) (x+1) same thing ;-;
I think u should just ask a teacher or watch a tutorial or smthn, this is like the worst explanation ever. But yeah once u know the method, you'll find expanding double brackets rly easy.