а)При m = 10:
(810 - 3)(810 + 3) - (410 + 3)(1610 - 3)= (80 - 3)(80 + 3) - (40 + 3)(160 - 3)= 77 83 - 43 157= 6409 - 6760= -351
При m = -1.5:
(8(-1.5) - 3)(8(-1.5) + 3) - (4(-1.5) + 3)(16(-1.5) - 3)= (-12 - 3)(-12 + 3) - (-6 + 3)(-24 - 3)= -15 -9 - (-3) (-27)= 135 - 81= 54
б)При x = -9:
(5(-9) + 7)(3(-9) + 7) - (4*(-9) + 7)^2= (-45 + 7)(-27 + 7) - (-36 + 7)^2= (-38)(-20) - (-29)^2= 760 - 841= -81
При x = 0.7:
(50.7 + 7)(30.7 + 7) - (4*0.7 + 7)^2= (3.5 + 7)(2.1 + 7) - (2.8 + 7)^2= (10.5)(9.1) - (9.8)^2= 95.55 - 96.04= -0.49
а)
При m = 10:
(810 - 3)(810 + 3) - (410 + 3)(1610 - 3)
= (80 - 3)(80 + 3) - (40 + 3)(160 - 3)
= 77 83 - 43 157
= 6409 - 6760
= -351
При m = -1.5:
(8(-1.5) - 3)(8(-1.5) + 3) - (4(-1.5) + 3)(16(-1.5) - 3)
= (-12 - 3)(-12 + 3) - (-6 + 3)(-24 - 3)
= -15 -9 - (-3) (-27)
= 135 - 81
= 54
б)
При x = -9:
(5(-9) + 7)(3(-9) + 7) - (4*(-9) + 7)^2
= (-45 + 7)(-27 + 7) - (-36 + 7)^2
= (-38)(-20) - (-29)^2
= 760 - 841
= -81
При x = 0.7:
(50.7 + 7)(30.7 + 7) - (4*0.7 + 7)^2
= (3.5 + 7)(2.1 + 7) - (2.8 + 7)^2
= (10.5)(9.1) - (9.8)^2
= 95.55 - 96.04
= -0.49