Question

4x⁴ - 7x² -2 solve it fast​

Answer 1

Step-by-step explanation:

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4x4-7x²-2=0

substitute x*4=y²

u get

4y²-7y-2=0

4y²-8y+y-2=0

4y(y-2)+1(y-2)=0

(y-2)(4y+1)=0

y=2,y=-1/4 is the answer

Answer 2

HERE IS UR ANSWER DEAR,

4x⁴ -7x² -2 = 0

x²(4x²-7)-2 = 0

(x²-2)(4x²-7) = 0

(x²-2=0

x²= 2

x= √2

4x²-7= 0

4x²=7

x²= 7/4

x= √7/4