Question

quais são os calculos
F) (5a+3)²+(5a-3)² -2 (a+5)

G) (2x-3)²+ (x-5) (x+5) - (x+4)²

Answer 1

f) (5a+3)²+(5a-3)²-2(a+5)=
1dtb:
(5a+3)(5a+3)=
25a²+15a+15a+9=
25a²+30a+9
2dtb:
(5a-3)(5a-3)=
25a²-15a-15a+9=
25a²-30a+9
3dtb:
-2(a+5)=
-2a-12
semelhantes:
25a²+30a+9+25a²-30a+9-2a-12=
50a²-2a-12

g)(2x-3)²+ (x-5) (x+5) - (x+4)²
1dtb:
(2x-3)(2x-3)=
4x²-6x-6x+9=
4x²-12x+9
2dtb:
(x-5)(x-5)=
x²-5x-5x+25=
x²-10x+25
3dtb:
-(x+4).-(x+4)=
(-x-4)(-x-4)=
+x²+4x+4x+16=
x²+8x+16
semelhantes:
4x²-12x+9+x²-10x+25+x²+8x+16=
6x²-14x+25
espero ter ajudado