Question

va rogggg am nevoie urgenttttttt!!!!!!

Answer 1

La ex2 nu îmi mai amintesc formula

Answer 2

Răspuns

3 a.(x+20)(x-20)=x²-400

b.(10x-7y)(10x+7y)=100x²-49y²

c(.13x-y²)(13x+y²)=169x²-yla puterea 4

d.(5√7x+3)(5√7x-3)=175x²-9

4.a.(x+y+6)²=x²+y²+36+2xy+12y+12x

b.(2x+5y+1)²=4x²+25y²+1+20xy+10y+4x

c.(3x²-y-1)²=9x la puterea 4+y²+1-6x²y+2y-6x²

d.(2a³+6b-3c)²=4a la puterea 6 +36b²+9c²+24a³b-12a³c-36bc

e.(3√2x-√3y+2√5z)²=6x+3y+10z-6√6xy-4√15yz+12√10xz

=4a la puterea 6+36b²+9c²+24a³b-12a³c-36bc

e.(3√2x-3√3y+2√5z)

Explicație pas cu pas: