The square of a certain number is seven more than six times the number. what is the number?

Sagot :

Answer:

7 and -1 (not sure kung tama ginawa ko)

Step-by-step explanation:

gawing formula yung nakasulat sa problem

x² = 7 + 6x

transpose mo yung "7+6x" papunta sa left side then equate mo sa 0

x²-6x-7=0

factoring trinomials

(x-7)(x+1)=0

equate mo pareho yung nasa dalawang parenthesis sa 0

x-7=0 →x=7

x+1=0 →x-1

then isubstitute mo yung nakuha mong value ng x sa original equation

CHECKING: if x=-1

x²=7+6x

(-1)²=7+6(-1)

1=7+(-6)

1=7-6

1=1

CHECKING IF x=7

x²=7+6x

(7)²=7+6(7)

49=7+42

49=49

nakalagay kasi ay what is the number so not sure lang kung ok lang na dalawa ang answer, basta bahala ka na po