y = 2, 4, 6, 8
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4x2-4x-3=0 can be written as (2x-3)(2x+1)=0 Anything times by 0 equals 0 ( the zero property of multiplication) therefore we need to make each one of these terms in brackets equal to 0. so 2x-3=0 giving x=3/2 and 2x+1=0 giving x=-1/2
If that's - 8x - 5, the answer is (2x + 1)(2x - 5). If that's + 8x + 5, it gets ugly in a hurry.
4x2 + 8x + 4 = 4 (x2 + 2x + 1) = 4 (x + 1)2
3(2x + 3y)(2x - 3y)
Squared numbers are just the number times itself. If it's a prime square, like 9, the factors are 3 x 3. If it's a composite square, like 16, the factors can be broken down further, from 4 x 4 to 2 x 2 x 2 x 2.