Respuesta :
y 2 + 6 y − 16 = ( y + 8 ) ( y − 2 )
Explanation:
Note that in general:
( y + a ) (y − b ) = y 2 + ( a − b ) y − a b
So we want to find a pair of factors a and b of 16 which differ by 6 .
The pair 8 , 2 works in that 8− 2 = 6 and 8 ⋅ 2= 16 .
Hence:
y 2 + 6 y − 16 = ( y+ 8 ) ( y − 2 )
y=2,-8
Answer:
y=2 y=-8
Step-by-step explanation:
y^2+6y-16=0
this is a quadratic equation
we are going to factor as you have mention you want it solved with factorization;
The first term is, y2 its coefficient is 1 .
The middle term is, +6y its coefficient is 6 .
The last term, "the constant", is -16
Multiply the coefficient of the first term by the constant 1 • -16 = -16
Find two factors of -16 whose sum equals the coefficient of the middle term, which is 6 .
-2+8 = 6
Rewrite the polynomial splitting the middle term using the two factors found in step 2 above, -2 and 8
y^2 - 2y + 8y - 16
Add up the first 2 terms, pulling out like factors :
y • (y-2)
Add up the last 2 terms, pulling out common factors :
8 • (y-2)
Add up the four terms
(y+8) • (y-2)
Which is the desired factorization
y=2 y=-8
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