mtk. plisss dibantu pakai cara yaaa

5) 4x^2 - mx + 25 = 0
D = 0
b^2 - 4ac = 0
(-m)^2 - 4(25)(4) = 0
m^2 = 400
m = +- √400
m = +- 20
m = 20 atau m = -20
utk m= 20
4x^2 - 20x + 25 = 0
X1 + X2 = -b/a = -(-20)/4 = 5 ★
utk m = -20
4x^2 + 20x + 25 = 0
X1 + X2 = -20/4 = -5 ★
Jawaban C

6) x^2 + (2p-3)x + 2p-19 = 0
X1 + X2 = 0
-b/a = 0
-(2p-3) = 0
-2p + 3 = 0
p = 3/2
X1 . X2 = c/a = 2p-19 = 2(3/2)-19 = 3 - 19 = -16 ★
Jawaban D

7) x^2 + 4x + (p-4) = 0
X1 : X2 = 1 : 3
X1 = 1/3 X2
X1 + X2 = -b/a = -4/1 = -4
1/3 X2 + X2= -4
4/3 X2 = -4
X2 = -3 ★
X1 = 1/3 X2 = 1/3 (-3) = -1 ★
X1 . X2 = p-4
(-1)(-3) = p - 4
3 = p - 4
p = 3 + 4 = 7 ★
Jawaban E

Tetap Semangat
»»»※※※ JKIRA ※※※«««