alexandraguzman5 alexandraguzman5

06-02-2020
Mathematics

contestada

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

Respuesta :

06-02-2020

Answer:

B.)-4 and 4

Step-by-step explanation:

Answer Link

jeshar668 jeshar668

06-02-2020

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

Answer Link

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