How do you simplify #y = 4(x + 5) - 2(x + 1)(x + 1)#?
1 Answer
Jul 16, 2016
#=18-2x^2#
Explanation:
We can start off by multiplying the
#=4x+20 - 2(x+1)^(2)#
Remembering that
#=4x+20 - 2(x^2+2x+1)#
The tricky part here is that we have a negative out on front of the
#=cancel(4x)+20 - 2x^2cancel(-4x)-2#
#=20 - 2x^2-2#
#=18- 2x^2 #
Or the equivalent:
#=2(9-x^2)#
#=2(3-x)(3+x)#