3 years ago

Solve by factoring. x2 - 49 = 0

1 answer:

6 0

Remember
difference of 2 perfect squares
a^2-b^2=(a-b)(a+b)

(x)^2-(7)^2=(x-7)(x+7)

set to zero
x-7=0
x=7

x+7=0
x=-7

x=-7 or 7

You might be interested in

Solve the given inequality and SHOW YOUR WORK<br> -2x + 3 < 5

natita [175]

-2x<5-3

-2x<2

divide both sides by -2

x<-1

remember +/-=-

that's why it's a negative answer

4 0

3 years ago

Pls help!!! 30 points

ikadub [295]

Answer:

2.4x-4.4

Step-by-step explanation:

0.3(4x-8)-0.5(-2.4x+4)

1.2x-2.4+1.2x-2

2.4x-4.4

6 0

3 years ago

Read 2 more answers

A student concludes that the solution to the equation ( 2×+1+3=0 is×=4

Slav-nsk [51]

Answer:

x = -2

Step-by-step explanation:

2x + 1 + 3 = 0

2x + 4 = 0

x = -2

4 0

2 years ago

please help me I’m begging you. I need the right answers and an explanation how you got that right answer. thanks

Nat2105 [25]

Answer:

Step-by-step explanation:

I think its a normal 7 and a normal 3 then a -4 and a -9 and a -10

7 0

2 years ago

Interest problems I’m in business Econ and I’m having help with Annuity present value and amortization if u can help me can u

Leya [2.2K]

Answer:

so the annuity present value and amortization can bond and create economics.

Step-by-step explanation:

5 0

3 years ago