Question

Упростите выражение 7 класс

Answer 1

Ответ:

В решении.

Объяснение:

Упростить:

1)(х-5)²-7=

=х²-10х+25-7=

=х²-10х+18;

2)6у+(у-3)²=

=6у+у²-6у+9=

=у²+9;

3)(4a-5b)²-16a(a-3b)=

=16a²-40ab+25b²-16a²+48ab=

=25b²+8ab=

=b(25b+8a);

4)x(х-2)-(х-3)²=

=х(х-2)-(х²-6х+9)=

=х²-2х-х²+6х-9=

=4х-9;

5)(8p-q)²-(4p-q)(16p+3q)=

=(64p²-16pq+q²)-(64p²+12pq-16pq-3q²)

=(64p²-16pq+q²)-(64p²-4pq-3q²)=

=64p²-16pq+q² - 64p²+4pq+3q²=

=4q²-12pq=

=4q(q-3p).