Hanalouidn
Answered

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do you agree that  not all quadratic equation can be solve by factoring ?justify ur answer by giving example.
which of the ff. quadratic equation may be solve more appropriately by factoring? explain ur answer.
a.2xsquered =72
b.t squ. +12t+36=0
c.w squ. -64=0
d.2s squ. +8s-10=0

Sagot :

Cheahjimmyidn
2x² =  72
x² =  72/2 =    36
x  =    + 6    or  -6
t² + 12t + 36 = 0          by factoring
( t + 6) (t+ 6) = 0
t =    -6
w² - 64 = 0        ^    w² = 64            ^    w =    + 6     or     -6      by square root method
example of a quadratic equation that cannot be solved by factoring
   x² + 4x + 5= 0        because the factor of  5 is      1 & 5,    when you add 1 + 5 =6
                                   it must be    4     before it can be solved by factoring
so you must solve by formula or completing the square method