Răspuns:
Explicație pas cu pas:
4×(x-5)²-(3x)²=2²·(x-5)²-(3x)²=[2·(x-5)]²-(3x)²=[2(x-5)-3x]·[2(x-5)+3x]=
=(2x-10-3x)(2x-10+3x)=(-x-10)(5x-10)=-1·(x+10)·5·(x-2)=-5·(x+10)·(x-2).
Răspuns:
[tex]4 \times ({x}^{2} - 10x + 25 - 9 {x}^{2}) = 4 \times( {x}^{2} - 9 {x}^{2} - 10x + 25) = 4 {x}^{2} - 36 {x}^{2} - 40x + 100 = - 32 {x}^{2} - 40x + 100 [/tex]