إجابة:
# س = 2 #
# س = -1/4 #
تفسير:
معطى -
# 4X ^ 2 = 2 + 7X #
# 4X ^ 2-7x-2 = 0 #
# س ^ 2-7 / 4X-2/4 = 0 #
# س ^ 2-7 / 4X-1/2 = 0 #
# س ^ 2-7 / 4X = 1/2 #
# x ^ 2-7 / 4x + 49/64 = 1/2 + 49/64 = (32 + 49) / 64 = 81/64 #
# (س ^ 2-7 / 8) ^ 2 = 81/64 #
# (خ-08/07) = + - الجذر التربيعي (81/64) #
# (خ-08/07) = + - 9/8 #
# س = 9/8 + 08/07 = (9 + 7) / 8 = 16/8 = 2 #
# س = 2 #
# س = -9/8 + 7/8 = (- 9 + 7) / 8 = -2/8 = -1/4 #
# س = -1/4 #