Question

Me ajudeemmmm por favorrrrrr ❤️ urgenteee

Answer 1

a) (2x + 4) (2x - 4) = 4x² -8x +8x - 16 = 4x² - 16

b) (7x + 6) (7x - 6) = 49x² - 42x + 42x - 36 = 49x² - 36

c) (10x³ - 12) ( 10x³ + 12) = 100x⁶ + 120x³ - 120x³ - 144 = 100x⁶ - 144

d) (20z + 10x) (20z - 10x) = 400z² - 200zx + 200zx - 100x² = 400z² - 100x²

Answer 2

a)
$(2x+4)(2x-4)=(2x)^2-4^2=4x^2-16$

b)
$(7x+6)(7x-6)=(7x)^2-6^2=49x^2-36$

c)
$(10x^3-12)(10x^3+12)=(10x^3)^2-12^2=100x^6-144$

d)
$(20z+10x)(20z-10x)=(20z)^2-(10x)^2=400z^2-100x^2$

e)
$(4x+7)(4x-7)=(4x)^2-7^2=16x^2-49$

f)
$(12x+8)(12x-8)=(12x)^2-8^2=144x^2-64$