Answer:
hi is this correct please let me know
Explanation:
4x
4
+91x
2
−225=0
Substitute t for x
2
.
4t
2
+91t−225=0
All equations of the form ax
2
+bx+c=0 can be solved using the quadratic formula:
2a
−b±
b
2
−4ac
. Substitute 4 for a, 91 for b, and −225 for c in the quadratic formula.
t=
2×4
−91±
91
2
−4×4(−225)
Do the calculations.
t=
8
−91±109
Solve the equation t=
8
−91±109
when ± is plus and when ± is minus.
t= 49
t=−25