Answer:
-7
Step-by-step explanation:
-7 is the number that is attached to the y. It is the coefficient. Another possible coefficient is 1, but you do not need to write it, as anything multiplied by 1 is equal to the original number.
Hope this was helpful! Let me know if you have any further questions. :)
Step-by-step explanation:
1. a²=25²-15²
a²=(25-15)(25+15)
a²=10×40
a=20
2.b²=10²-6²
b²=(10-6) ×(10+6)
b²=4×16
b=8
The discriminant determines the number of real solutions. If the discriminant is positive, there will be two solutions. If it's negative, there are no solutions. If it's 0, there is one solution
