Respuesta :

GonJun

Answer:

B.)-4 and 4

Step-by-step explanation:

jeshar668

Answer:

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

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