tolong isiin ka soal ini

a. 4x^2 - 1 =0
4x^2 - 1^2 =0
(2x -1)(2x + 1)=0
2x -1=0 ...... 2x+1=0
2x = 1 ...........2x = - 1
x = 1/2 ........ x = - 1/2
hp (- 1/2 , 1/2)


b. x^2 +7x+12=0
(x+3)(x+4)=0
x+3=0 ..... x+4=0
x= - 3 ......... x = -4
hp ( -4,-3)


c. 2x^2 -7x -30 =0
(2x +5)(x-6)=0
2x+5=0 ..... x-6=0
2x = -5 ......... x = 6
x = - 5/2 ...... x = 6
hp ( - 5/2 , 6)


d. 3x^2 +4x -4 =0
(3x - 2)(x+2)=0
3x - 2=0 ...... x +2=0
3x = 2 ........... x = - 2
x = 2/3 ........ x = - 2
hp (-2, 2/3)

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