Question

solve using formula method. x square - 4 x minus 8 is equal to zero...plzzz solve​

Answer 1

ANSWER

FOR A QUADRATIC EQUATION AX^2+BX+C

ROOTS ARE GIVEN BY

X = -B + √(B^2-4AC) / 2A

HERE

A = 1

B = -4

C= -8

X = -(-4) +√[(-4) ^2 -4(1) (-8) ] / 2×(1)

X = 4 + √( 16 + 32) / 2

X = 4 + 4√3 /2

X = 2 + 2√3

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