回答:
#x = 2#
#x = -1 / 4#
説明:
与えられた -
#4x ^ 2 = 2 + 7x#
#4x ^ 2-7x-2 = 0#
#x ^ 2-7 / 4x-2/4 = 0#
#x ^ 2-7 / 4x-1/2 = 0#
#x ^ 2-7 / 4x = 1/2#
#x ^ 2-7 / 4x + 49/64 = 1/2 + 49/64 =(32 + 49)/ 64 = 81/64#
#(x ^ 2-7 / 8)^ 2 = 81/64#
#(x-7/8)= + - sqrt(81/64)#
#(x-7/8)= + - 9/8#
#x = 9/8 + 7/8 =(9 + 7)/ 8 = 16/8 = 2#
#x = 2#
#x = -9 / 8 + 7/8 =( - 9 + 7)/ 8 = -2 / 8 = -1 / 4#
#x = -1 / 4#