What are the solutions to the equation y2=49?

A.) - 5 and 5

B.) - 4 and 4

C.) - 7 and 7

D.) - 6 and 6

Question

Mathematics

Ronnie Dunlap

27 November, 20:36

What are the solutions to the equation y2=49?

A.) - 5 and 5

B.) - 4 and 4

C.) - 7 and 7

D.) - 6 and 6

+1

Answers (2)

Know the Answer?

Micah Mcclure · Answer 1

C.-7 and 7

Step-by-step explanation:

y2=49

y2-49=0

We will first factorise the expression.

As per property:

a2-b2 = (a-b) (a+b)

So,

y2-49 = (y-7) (y+7)

We now equate the factors to zero to find the solutions:

y-7=0, y=7

y+7=0, y=-7

Sophie Cobb · Answer 2

B.) - 4 and 4

What are the solutions to the equation y2=49?A.) - 5 and 5B.) - 4 and 4C.) - 7 and 7D.) - 6 and 6

What are the solutions to the equation y2=49?

A.) - 5 and 5

B.) - 4 and 4

C.) - 7 and 7

D.) - 6 and 6