Kevin built a deck in his backyard. The length of the deck was x feet and the width of the deck was 3 feet longer than the lengt
1 answer:
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Alrighty
remember
means 
and
and
for all real values of x
so
means
means
which simplifies to
1=x²+4x-5
minus 1 both sides
0=x²+4x-6
use quadratic formula or complete the square
and 
2 solutions
remember
and
and
so
1=x²+4x-5
minus 1 both sides
0=x²+4x-6
use quadratic formula or complete the square
2 solutions