Thiếu kiểu hình nhé bạn!

\(b.\left(2x-1\right)^2-25=0\)

<=>\(\left(2x-1-5\right)\left(2x-1+5\right)=0\)

<=>\(\left[{}\begin{matrix}2x=6\\2x=-4\end{matrix}\right.< =>\left[{}\begin{matrix}x=3\\x=-2\end{matrix}\right.\)

\(a.2x^2-16x=0< =>2x\left(x-8\right)=0\)

\(< =>\left[{}\begin{matrix}2x=0\\x-8=0\end{matrix}\right.< =>\left[{}\begin{matrix}x=0\\x=8\end{matrix}\right.\)

Look! He (leave) __is leaving_______ the house.

Quiet please! I (write) _am writing _____ a test.

She usually (walk)___walks___  to school.

But look! Today she (go) __is going___ by bike.

Every Sunday we (go) ___go____ to see my grandparents.

He often (go)__goes______  to the cinema.

We (play) _____are playing _ Monopoly at the moment.

The child seldom (cry)___cries _______ .

I (not / do) am not doing____ anything at the moment.

(watch / he)___Does he watch _____ the news regularly?

\(a)=x^3(x+3)+x(x+3)=(x^2+x)(x+3)=x(x+1)(x+3)\\b)=(x+3y)^2-4z^2=(x+3y-2z)(x+3y+2z)\\c)=2x^2-2x-7x+7=2x(x-1)-7(x-1)=(2x-7)(x-1)\)

P: AaBb x aaBb

Gp AB,Ab,aB,ab.    aB,ab

F1: 1AABB:2AABb:2Aabb:1AaBB:1AAbb:1aabb:1aaBb

Kiểu gen:3A_B_:3A_bb:1aaB_:1aabb

=AC+AD+BC+BD

Kiểu gen: Thân cao: AA.              Thân thấp: aa

P(t/c).    AA( thân cao).     x.       aa( thân thấp)

Gp.       A.                                   a

F1:   Aa(100% thân cao)

F1xF1:   Aa( thân cao).  x.   Aa( thân cao)

GF1:     A,a.                       A,a

F2: 1AA:2Aa:1aa

kiểu hình:3 thân cao:1 thân thấp