Question

Tlong di bantu dong hri ini kumpul: (x+9)(x-20) tolong yaa pleasee.
terus yg kedua: (6a+5b)(3a+7b)

Answer 1

(x+9)(x-20)
=x•x -20•x +9•x +9•(-20)
=x^2 -20x +9x -180
=x^2 -11x -180

(6a+5b)(3a+7b)
= 6a•3a +6a•7b +5b•3a +5b•7b
=18a^2 +42ab +15ab +35b^2
=18a^2 +57ab +35b^2

Answer 2

(x+9)(x-20)
=x.x-20.x+9.x-9.20
=x²-20x+9x-180
=x²-11x-180

(6a+5b)(3a+7b)
=6a.3a+6a.7b+5b.3a+5b.7b
=18a²+42ab+15ab+35b²
=18a²+57ab+35b²