How do you solve #8x^{2} + 21= - 59x#?
2 Answers
Explanation:
add
factor by grouping
. . . . . . . . . .
Set each component to
Case 1
Case 2
So
Let's graph the equation and see if we are right
graph{y = 8x^2 + 59x + 21}
We are! Nice job
Explanation:
By factoring:
The factors of 8 are (8,1) or (4,2)
The factors of 21 are (21,1) or (7,3)
Rearrange formula to equal zero
Since all signs are +, all factors will be +
By trial-and-error:
So,
And